Corydon too was interested in these discoveries, and became skilled at holding weather-boards while her husband nailed them, and at helping to unroll and measure roofing-paper, and climbing up the ladder and holding it in place. Even the baby became fired with the spirit of achievement, and would get himself a hammer and a board, and plague his parents until they started a dozen or so of nails for him--after which he would sit and blissfully pound them into the board, and all but pound them through the board in his enthusiasm. Before long he even learned to start them himself; and a most diverting sight it was to see this twenty-two-months old youngster driving nails like an infant Hercules. For the fastening of the roofing-paper they used little circular plates of tin called “cotterels”; and these also Cedric must learn to use. So a new phrase was added to the vocabulary of “dam-fool talk”. “Bongie cowtoos” was the name of the operation; for a couple Of years thereafter, whenever Corydon and Thyrsis wished to be let alone to discuss the problems of the universe, they would get the baby a hammer and some nails and a board, and repeat that magic formula, and the problem was solved. Unfortunately, however, it was not all smooth sailing in the carpentry-business. There were mashed thumbs and sawed fingers; and then, in an evil hour, Thyrsis came upon an advertisement which told of a wonderful new kind of wall-paper which could be applied directly to laths--thus enabling one to dispense with plaster. He sent for ten or twelve dollars’ worth of this material, and he and Corydon spent a whole morning making a mixture of glue and flour-paste and water, and boiling it in an iron preserving-kettle. But alas, the paper would not paste; and then they had a painful time. Corydon gave up in disgust, and went away; but Thyrsis, to whom economy was a kind of disease, would not give up, and was angry with the other for urging him to give up. He spent a whole day wrestling with the concoction, and gave himself a headache with the ghastly odor. But in the end he had to dump it out, and clean the kettle, and fasten the paper to the lathes with “bongie cowtoos”. As the strips of paper did not correspond with the studding, he found himself driving nails into springy laths, an operation most trying to the temper of any man of letters. One of the trials of this house forever after was that upon the least jar a corner of the ceiling was liable to fall loose; and then one would have to get a ladder, and climb up into a hot region, and pound nails into a broken lath, with dust sifting down into one’s eyes, and the hammer hitting one’s sore thumb, and occasioning exclamations not at all suitable for the ears of a two-year-old intelligence.