That afternoon Frank was down with his second attack of fever, a much more severe one than the first had been. Mr. Goodenough's favorite remedy had its effect of producing profuse perspiration, but two or three hours afterwards the hot fit again came on, and for the next four days Frank lay half delirious, at one time consumed with heat, and the next shivering as if plunged into ice water. Copious doses of quinine, however, gradually overcame the fever, and on the fifth day he was convalescent. It was, nevertheless, another week before he was sufficiently recovered to be able to resume his hunting expeditions. They again shifted their camp, and this time traveled for three weeks, making short journeys, and halting early so as to give half a day from each camping place for their work. Frank was one day out as usual with one of the Houssas. He had killed several birds when he saw a butterfly, of a species which he had not before met with, flitting across a gleam of sunshine which streamed in through a rift in the trees. He told his Houssa to wait where he was in charge of the two guns and birds, and started off with his net in pursuit of the butterfly. The creature fluttered away with Frank in full pursuit. Hither and thither it flitted, seemingly taking an impish delight in tantalizing Frank, settling on a spot where a gleam of sunlight streamed upon the bark of a tree, till Frank had stolen up within a couple of paces of it, and then darting away again at a pace which defied Frank's best attempts to keep up with it until it chose to play with him again. Intent only upon his chase Frank thought of nothing else. At last, with a shout of triumph, he inclosed the creature in his net, shook it into the wide pickle bottle, containing a sponge soaked with chloroform, and then, after tightly fitting in the stopper, he looked around. He uttered an exclamation of dismay as he did so. He saw by the bands of light the sun was already setting, and knew that he must have been for upwards of an hour in chase of the butterfly. He had not the slightest idea of the direction in which he had come. He had, he knew, run up hill and down, but whether he had been traveling in a circle or going straight in one direction, he had not the least idea. He might be within a hundred yards of the spot where he had left the Houssa. He might be three or four miles away.