Anything in the shape of natural history received strong encouragement from Lord Davidstow, as well as anything (Archie did not fully grasp this) that tended to keep him out of doors when his short lessons were done, and he and Jeannie started this year a series of joint collections. Certain rules had to be observed: flowers that they picked must be duly pressed and mounted on sheets of cartridge paper, and their names must be ascertained. One bird's egg might be taken in the absence of the mother-bird from any nest which contained four, and must be blown and put in its labelled cell in the egg-cabinet; but when three specimens of any sort had been collected, no more must be acquired. That, perhaps, was the collection Archie liked best, though the joys of the aquarium ran it close. The aquarium was a big bread-bowl lined at the bottom with spa and crystals, and in it lived caddis-worms and water-snails and a dace--probably weak in the head, for he had allowed himself to be caught in the landing-net without the least effort to get out of the way. He had an inordinate passion for small bread-pills, in pursuit of which he was so violently active that he often hit his nose against the side of the aquarium so hard that you could positively hear the stunning blow. When satiated he would still continue to rush after bread-pills, but, after holding them in his mouth a moment, he would expel them again with such force that he resembled some submarine discharging torpedoes. Then there was the butterfly and moth collection, which was of short duration, and was abandoned on account of a terrible happening. The insects were emptied into the killing-bottle, and when dead transfixed with a pin, and set. But one morning Archie, examining the setting-board to see if they were stiff and ready to be transferred into the cork-lined boxes, found, to his horror, that, so far from being stiff, two butterflies, a tortoiseshell and a brimstone, were alive still, with waving antennae and twitching bodies. That dreadful incident poisoned the joy of that collection; he felt himself guiltier of a worse outrage than Cyrus, and all Blessington's well-meant consolations that insects hardly felt anything at all would not induce him to run the risk of committing further atrocities. For a day and a night the two had writhed under their crucifixion, and that day the caterpillars were released from their breeding-cage (even including that piece of preciousness, the caterpillar of the convolvulus hawk with a horn on his tail), and the killing-bottle was relegated to the attic.