I--ADRIFT IN THE DESERTII--ON TO THE MOUNTAINSIII--THE SKELETONIV--"INDIANS!"V--BLUE WOLF TRIES THE BICYCLEVI--TRICK RIDINGVII--ESCAPEVIII--THE MYSTERY EXPLAINEDIX--A NIGHT ADVENTUREX--THE STORYXI--ANOTHER ESCAPEXII--AT LAKE TAHOEXIII--A RACE ON THE LAKEXIV--THE HERMIT'S POWERXV--RECOVERYXVI--LOST UNDERGROUNDXVII--BROTHER AND SISTERXVIII--OLD FRIENDSXIX--BART HODGE MAKES A CONFESSIONXX--FRANK BECOMES ALARMEDXXI--ARREST AND ESCAPEXXII--ISA ISBANXXIII--A KNOCK ON THE DOORXXIV--THE SHERIFF'S SHOTXXV--ESCAPE--CONCLUSION