3. The Snow-ball—The farther we proceed in this investigation into the methods of comedy, the more clearly we see the part played by childhood's memories. These memories refer, perhaps, less to any special game than to the mechanical device of which that game is a particular instance. The same general device, moreover, may be met with in widely different games, just as the same operatic air is found in many different arrangements and variations. What is here of importance and is retained in the mind, what passes by imperceptible stages from the games of a child to those of a man, is the mental diagram, the skeleton outline of the combination, or, if you like, the abstract formula of which these games are particular illustrations. Take, for instance, the rolling snow-ball, which increases in size as it moves along. We might just as well think of toy soldiers standing behind one another. Push the first and it tumbles down on the second, this latter knocks down the third, and the state of things goes from bad to worse until they all lie prone on the floor. Or again, take a house of cards that has been built up with infinite care: the first you touch seems uncertain
