Andrew J.Graham,  First standard-phonographic reade,  New York, Andrew J. Graham, 1860, p. 51.

We often see in pools of water, small bits of elongated tube is the home of a caddice worm, which is ultimately to become an insect or fly, such as the ephemeron fly. These worms are exposed to the ravages of birds and fishes, and hence they glue together small bits of wood and straw to make a house for shelter ; and when the frail castle is too buoyant, they add a piece of gravels to preserve the balance, in order that the castle shall not be burdensome nor too buoyant.