hard and clear as do the first strange happenings of our childhood.  No new impressions could efface those which are so deeply cut.  When the time comes I will describe that wondrous moonlit night upon the great lake when a young ichthyosaurus—­a strange creature, half seal, half fish, to look at, with bone-covered eyes on each side of his snout, and a third eye fixed upon the top of his head—­was entangled in an Indian net, and nearly upset our canoe before we towed it ashore; the same night that a green water-snake shot out from the rushes and carried off in its coils the steersman of Challenger’s canoe.  I will tell, too, of the great nocturnal white thing—­to this day we do not know whether it was beast or reptile—­which lived in a vile swamp to the east of the lake, and flitted about with a faint phosphorescent glimmer in the darkness.  The Indians were so terrified at it that they would not go near the place, and, though we twice made expeditions and saw it each time, we could not make our way through the deep marsh in which it lived.  I can only say that it seemed to be larger than a cow and had the strangest musky odor.  I will tell also of the huge bird which chased Challenger to the shelter of the rocks one day—­a great running bird, far taller than an ostrich, with a vulture-like neck and cruel head which made it a walking death.  As Challenger climbed to safety one dart of that savage curving beak shore off the heel of his boot as if it had been cut with a chisel.  This time at least modern weapons prevailed and the great creature, twelve feet from head to foot—­phororachus its name, according to our panting but exultant Professor—­went down before Lord Roxton’s rifle in a flurry of waving feathers and kicking limbs, with two remorseless yellow eyes glaring up from the midst of it.  May I live to see that flattened vicious skull in its own niche amid the trophies of the Albany.  Finally, I will assuredly give some account of the toxodon, the giant ten-foot guinea pig, with projecting chisel teeth, which we killed as it drank in the gray of the morning by the side of the lake.

All this I shall some day write at fuller length, and amidst these more stirring days I would tenderly sketch in these lovely summer evenings, when with the deep blue sky above us we lay in good comradeship among the long grasses by the wood and marveled at the strange fowl that swept over us and the quaint new creatures which crept from their burrows to watch us, while above us the boughs of the bushes were heavy with luscious fruit, and below us strange and lovely flowers peeped at us from among the herbage; or those long moonlit nights when we lay out upon the shimmering surface of the great lake and watched with wonder and awe the huge circles rippling out from the sudden splash of some fantastic monster; or the greenish gleam, far down in the deep water, of some strange creature upon the confines of darkness.  These are the scenes which my mind and my pen will dwell upon in every detail at some future day.