Oct. 9--Batta is lethargic and has taken to his bed. Have been giving Gamba tryparsamide for two weeks, and fancy he'll recover. Oct. 25--Batta very low, but Gamba nearly well.

  Nov. 18--Batta died yesterday, and a curious thing happened which gave me a real shiver in view of the native legends and Batta's own fears. When I returned to the laboratory after the death I heard the most singular buzzing and thrashing in cage 12, which contained the fly that bit Batta. The creature seemed frantic, but stopped still when I appeared--lighting on the wire netting and looking at me in the oddest way. It reached its legs through the eyes as if it were bewildered. When I came back from dining with Allen, the thing was dead. Evidently it had gone wild and beaten its life out on the sides of the cage.

  It certainly is peculiar that this should happen just as Batta died. If any black had seen it, he'd have laid it at once to the absorption of the poor devil's soul. I shall start my blue-stained hybrids on their way before long now. The hybrid's rate of killing seems a little ahead of the pure palpalis' rate, if anything. Batta died three months and eight days after infection--but of course there is always a wide margin of uncertainty. I almost wish I had let Gamba's case run on.

  Dec. 5--Busy planning how to get my envoys to Moore. I must have them appear to come from some disinterested entomologist who has read his Diptera of Central and Southern Africa and believes he would like to study this "new and unidentifiable species." There must also be ample assurances that the blue-winged fly is harmless, as proved by the natives' long experience. Moore will be off his guard, and one of the flies will surely get him sooner or later--though one can't tell just when.

  I'll have to rely on the letters of New York friends--they still speak of Moore from time to time--to keep me informed of early results, though I dare say the papers will announce his death. Above all, I must show now interest in his case. I shall mail the flies while on a trip, but must not be recognized when I do it. The best plan will be to take a long vacation in the interior, grow a beard, mail the package at Ukala while passing as a visiting entomologist, and return here after shaving off the beard. April 12, 1930--Back in M'gonga after my long trip. Everything has come off finely--with clockwork precision. Have sent the flies to Moore without leaving a trace. Got a Christmas vacation Dec. 15th, and set out at once with the proper stuff. Made a very good mailing container with room to include some germ-tainted crocodile meat as food for the envoys. By the end of February I had beard enough to shape into a close Vandyke. Showed up at Ukala March 9th and typed a letter to Moore on the trading-post machine. Signed it "Nevil Wayland-Hall"--supposed to be an entomologyist from London. Think I took the right tone--interest of a brother-scientist, and all that. Was artistically casual in emphasizing the "complete harmlessness" of the specimens. Nobody suspected anything. Shaved the beard as soon as I hit the bush, so there wouldn't be any uneven tanning by the time I got back here. Dispensed with native bearers except for one small stretch of swamp--I can do wonders with one knapsack, and my sense of direction is good. Luckily I'm used to such travelling. Explained my protracted absence by pleading a touch of fever and some mistakes in direction when going through the bush. But now comes the hardest part psychologically--waiting for news of Moore without showing the strain. Of course, he may possibly escape a bite until the venom is played out--but with his recklessness the chances are one hundred to one against him. I have no regrets; after what he did to me, he deserves this and more.

  June 30, 1930--Hurrah! The first step worked! Just heard casually from Dyson of Columbia that Moore had received some new blue-winged flies from Africa, and that he is badly puzzled over them! No word of any bite--but if I know Moore's slipshod ways as I think I do, there'll be one before long.

  August 27, 1930--Letter from Morton in Cambridge. He says Moore writes of feeling very run-down, and tells of an insect bite on the back of his neck--from a curious new specimen that he received about the middle of June. Have I succeeded? Apparently Moore doesn't connect the bite with his weakness. If this is the real stuff, then Moore was bitten well within the insect's period of infectivity.

  Sept. 12, 1930--Victory! Another line from Dyson says that Moore is really in an alarming shape. He now traces his illness to the bite, which he received around noon on June 19, and is quite bewildered about the identity of the insect. Is trying to get in touch with the "Nevil Wayland-Hall" who sent him the shipment. Of the hundred-odd that I sent, about twenty-five seem to have reached him alive. Some escaped at the time fo the bite, but several larvae have appeared from eggs laid since the time of mailing. He is, Dyson says, carefully incubating these larvae. When they mature I suppose he'll identify the tsetse-palpalis hybridization--but that won't do him much good now. He'll wonder, though, why the blue wings aren't transmitted by heredity!

  Nov. 8, 1930--Letters from half a dozen friends tell of Moore's serious illness. Dyson's came today. He says Moore is utterly at sea about the hybrids that came from the larvae and is beginning to think that the parents got their blue wings in some artificial way. Has to stay in bed most of the time now. No mention of using tryparsamide.

  Feb. 13, 1931--Not so good! Moore is sinking, and seems to know no remedy, but I think he suspects one. Had a very chilly letter from Morton last month, which told nothing of Moore; and now Dyson writes--also rather constrainedly--that Moore is forming theories about the whole matter. He's been making a search for "Wayland-Hall" by telegraph--at London, Ukala, Nairobi, Mombasa, and other places--and of course finds nothing. I judge that he's told Dyson whom he suspects, but that Dyson doesn't believe it yet. Fear Morton does believe it.

  I see that I'd better lay plans for getting out of here and effacing my identity for good. What an end to a career that started out so well! More of Moore's work--but this time he's paying for it in advance! Believe I'll go back to South Africa--and meanwhile will quietly deposit funds there to the credit of my new self--"Frederick Nasmyth Mason of Toronto, Canada, broker in mining properties." Will establish a new signature for identification. If I never have to take the step, I can easily re-transfer the funds to my present self.

  Aug. 15, 1931--Half a year gone, and still suspense. Dyson and Morton--as well as several other friends--seem to have stopped writing me. Doctor James of San Francisco hears from Moore's friends now and then, and says Moore is in an almost continuous coma. He hasn't been able to walk since May. As long as he could talk he complained of being cold. Now he can't talk, though it is thought he still has glimmers of consciousness. His breathing is short and quick, and can be heard some distance away.

  Now question but the trypanosoma gambiense is feeding on him--but he holds out better than the niggers around here. Three months and eight days finished Batta and here Moore is alive over a year after his biting. Heard rumors last month of an intensive search around Ukala for "Wayland-Hall." Don't think I need to worry yet, though, for there's absolutely nothing in existence to link me with this business.

  Oct. 7, 1931--It's over at last! News in the Mombasa Gazette. Moore died September 20 after a series of trembling fits and with a temperature vastly below normal. So much for that! I said I'd get him, and I did! The paper has a three-column report of his long illness and death, and of the futile search for "Wayland-Hall." Obviously, Moore was a bigger character in Africa than I had realized. The insect that bit him has now been fully identified from the surviving specimens and developed larvae, and the wing-staining is also detected. It is universally realized that the flies were prepared and shipped with intent to kill. Moore, it appears, communicated certain suspicions to Dyson, but the latter--and the police--are maintaining secrecy because of absence of proof. All of Moore's enemies are being looked up, and the Associated Press hints that "an investigation, possibly involving an eminent physician now abroad, will follow."

  One thing at the very end of the report--undoubtedly the cheap romancing of a yellow journalist--gives me a curious shudder in view of the legends of the blacks and the way the fly happened to go wild
when Batta died. It seems that an odd incident occurred on the night of Moore's death; Dyson having been aroused by the buzzing of a blue-winged fly--which immediately flew out the window--just before the nurse telephoned the death news from Moore's home, miles away in Brooklyn.

  But what concerns me most is the African end of the matter. People at Ukala remember the bearded stranger who typed the letter and sent the package, and the constabulary are combing the country for any blacks who may have carried him. I didn't use many, but if officers question the Ubandes who took me through N'Kini jungle belt I'll have to explain more than I like. It looks as if the time has come for me to vanish; so tomorrow I believe I'll resign and prepare to start for parts unknown. Nov. 9, 1931--Hard work getting my resignation acted on, but release came today. I didn't want to aggravate suspicion by decamping outright. Last week I heard from James about Moore's death--but nothing more than is in the papers. Those around him in New York seem rather reticent about details, though they all talk about a searching investigation. No word from any of my friends in the East. Moore must have spread some dangerous suspicions around before he lost consciousness--but there isn't an iota of proof he could have adduced.

  Still, I am taking no chances. On Thursday I shall start for Mombasa, and when there will take a steamer down the coast to Durban. After that I shall drop from sight--but soon afterward the mining properties broker Frederick Nasmyth Mason, from Toronto, will turn up in Johannesburg.

  Let this be the end of my journal. If in the end I am not suspected, it will serve its original purpose after my death and reveal what would not otherwise be known. If, on the other hand, these suspicions do materialize and persist, it will confirm and clarify the vague charges, and fill in many important and puzzling gaps. Of course, if danger comes my way I shall have to destroy it.

  Well, Moore is dead--as he amply deserves to be. Now Doctor Thomas Slauenwite is dead, too. And when the body formerly belonging to Thomas Slauenwite is dead, the public may have this record.

  III

  Jan. 15, 1932--A new year--and a reluctant reopening of this journal. This time I am writing solely to relieve my mind, for it would be absurd to fancy that the case is not definitely closed. I am settled in the Vaal Hotel, Johannesburg, under my new name, and no one has so far challenged my identity. Have had some inconclusive business talks to keep up my part as a mine broker, and believe I may actually work myself into that business. Later I shall go to Toronto and plant a few evidences for my fictitious past.

  But what is bothering me is an insect that invaded my room around noon today. Of course I have had all sorts of nightmares about blue flies of late, but those were only to be expected in view of my prevailing nervous strain. This thing, however, was a waking actuality, and I am utterly at a loss to account for it. It buzzed around my bookshelf for fully a quarter of an hour, and eluded every attempt to catch or kill it. The queerest thing was its color and aspect--for it had blue wings and was in every way a duplicate of my hybrid envoys of death. How it could possibly be one of these in fact, I certainly don't know. I disposed of all the hybrids--stained and unstained--that I didn't send to Moore, and can't recall any instance of escape.

  Can this be wholly an hallucination? Or could any of the specimens that escaped in Brooklyn when Moore was bitten have found their way back to Africa? There was that absurd story of the fly that waked Dyson when Moore died--but after all, the survival and return of some of the things is not impossible. It is perfectly plausible that the blue should stick to their wings, for the pigment I devised was almost as good as tattooing for permanence. By elimination, that would seem to be the only rational explanation for this thing; though it is very curious that the fellow has come as far south as this. Possibly its some hereditary homing instinct inherent in the tsetse strain. After all, that side of him belongs to South Africa. I must be on my guard against a bite. Of course the original venom--if this is actually one of the flies that escaped from Moore--was worn out ages ago; but the fellow must have fed as he flew back from America, and he may well have come through Central Africa and picked up a fresh infectivity. Indeed, that's more probable than not; for the palpalis half of his heredity would naturally take him back to Uganda, and all the trypanosomiasis germs. I still have some of the tryparsamide left--I couldn't bear to destroy my medicine case, incriminating though it may be--but since reading up on the subject I am not so sure about the drug's action as I was. It gives one a fighting chance--certainly it saved Gamba--but there's always a large probability of failure.

  It's devilish queer that this fly should have happened to come into my room--of all places in the wide expanse of Africa! Seems to strain coincidence to breaking point. I suppose that if it comes again, I shall certainly kill it. I'm surprised that it escaped me today, for ordinarily these fellows are extremely stupid and easy to catch. Can it be a pure illusion after all? Certainly the heat is getting me of late as it never did before--even up around Uganda. Jan. 16--Am I going insane? The fly came up again this noon, and acted so anomalously that I can't make head or tail of it. Only delusion on my part could account for what that buzzing pest seemed to do. It appeared from nowhere, and went straight to my bookshelf--circling again and again to front a copy of Moore's Diptera of Central and Southern Africa. Now and then it would light on top or back of the volume, and occasionally it would dart forward toward me and retreat before I could strike at it with a folded paper. Such cunning is unheard of among the notoriously stupid African diptera. For nearly half an hour I tried to get the cursed thing, but at last it darted out the window through a hole in the screen that I hadn't noticed. At times I fancied it deliberately mocked me by coming within reach of my weapon and then skilfully sidestepping as I struck out. I must keep a tight hold of my consciousness.

  Jan. 17--Either I am mad or the world is in the grip of some sudden suspension of the laws of probability as we know them. That damnable fly came in from somewhere just before noon and commenced buzzing around the copy of Moore's Diptera on my shelf. Again I tried to catch it, and again yesterday's experience was repeated. Finally the pest made for the open inkwell on my table and dipped itself in--just the legs and thorax, keeping its wings clear. Then it sailed up to the ceiling and lit--beginning to crawl around in a curved patch and leaving a trail of ink. After a time it hopped a bit and made a single ink spot unconnected with the trail--until it dropped squarely in front of my face, and buzzed out of sight before I could get it. Something about this whole business struck me as monstrously sinister and abnormal--more so than I could explain to myself. When I looked at the ink-trail on the ceiling from different angles, it seemed more and more familiar to me, and it dawned on me suddenly that it formed an absolutely perfect questionmark. What device could be more malignly appropriate? It is a wonder that I did not faint. So far the hotel attendants have not noticed it. Have not seen the fly this afternoon and evening, but am keeping my inkwell securely closed. I think my extermination of Moore must be preying on me, and giving me morbid hallucinations. Perhaps there is no fly at all.

  Jan. 18--Into what strange hell of living nightmare am I plunged? What occurred today is something which could not normally happen--and yet an hotel attendant has seen the marks on the ceiling and concedes their reality. About 11 o'clock this morning, as I was writing on a manuscript, something darted down to the inkwell for a second and flashed aloft again before I could see what it was. Looking up, I saw that hellish fly on the ceiling as it had been before--crawling along and tracing another trail of curves and turns. There was nothing I could do, but I folded a newspaper in readiness to get the creature if it should fly near enough. When it had made several turns on the ceiling it flew into a dark corner and disappeared, and as I looked upward at the doubly defaced plastering I saw that the new ink-trail was that of a huge and unmistakable figure 5!

  For a time I was almost unconscious from a wave of nameless menace for which I could not fully account. Then I summoned up my resolution and took an active step. Goi
ng out to a chemist's shop I purchased some gum and other things necessary for preparing a sticky trap--also a duplicate inkwell. Returning to my room, I filled the new inkwell with the sticky mixture and set it where the old one had been, leaving it open. Then I tried to concentrate my mind on some reading. About 3 o'clock I heard the accursed insect again, and saw it circling around the new inkwell. It descended to the sticky surface but did not touch it, and afterward sailed straight toward me--retreating before I could hit it. Then it went to the bookshelf and circled around Moore's treatise. There is something profound and diabolic about the way the intruder hovers near that book.

  The worst part was the last. Leaving Moore's book, the insect flew over to the open window and began beating itself rhythmically against the wire screen. There would be a series of beats and then a series of equal length and another pause, and so on. Something about this performance held me motionless for a couple of moments, but after that I went over to the window and tried to kill the noxious thing. As usual, no use. It merely flew across the room to a lamp and began beating the same tattoo on the stiff cardboard shade. I felt a vague desperation and proceeded to shut all the doors as well as the window whose screen had the imperceptible hole. It seemed very necessary to kill this persistent being, whose hounding was rapidly unseating my mind. Then, unconsciously counting, I began to notice that each of its series of beatings contained jus five strokes.

  Five--the same number that the thing had traced in ink on the ceiling in the morning! Could there be any conceivable connection? The notion was maniacal, for that would argue a human intellect and a knowledge of written figures in the hybrid fly. A human intellect--did that not take one back to the most primitive legends of the Uganda blacks? And yet there was that infernal cleverness in eluding me as contrasted with the normal stupidity of the breed. As I laid aside my folded paper and sat down in growing horror, the insect buzzed aloft and disappeared through a hole in the ceiling where the radiator pipe went to the room above. The departure did not soothe me, for my mind had started on a train of wild and terrible reflections. If this fly had a human intelligence, where did that intelligence come from? Was there any truth in the native notion that these creatures acquire the personality of their victims after the latters' death? If so, whose personality did this fly bear? I had reasoned out that it must be one of those which escaped from Moore at the time he was bitten. Was this the envoy of death which had bitten Moore? If so, what did it want with me? What did it want with me anyway? In a cold perspiration I remembered the actions of the fly that had bitten Batta when Batta died. Had its own personality been displaced by that of its dead victim? Then there was that sensational news account of the fly that waked Dyson when Moore died. As for that fly that was hounding me--could it be that a vindictive human personality drove it on? How it hovered around Moore's book!--I refused to think any farther than that. All at once I began to feel sure that the creature was indeed infected, and in the most virulent way. With a malign deliberation so evident in every act, it must surely have charged itself on purpose with the deadliest bacilli in all Africa. My mind, thoroughly shaken, was now taking the thing's human qualities for granted.