I was especially fascinated

Ros E. Hutchins, Trails to Nature’s Mysteries, New York, Dodd, Mead & Company, 1977, p. 36.

I found some flat-sided jars in a store room into which placed some of the aquatic specimens. Through the walls of theses « aquaria » I could watch the activity of caddis insects and water beetles. I was especially fascinated by the caddis insects, watching how they built their cases of bright pebbles. I thought that it would be interesting to remove all the sand and pebbles from my aquaria and substitute small colored beads from my mother’s sewing basket. I visualized them constructing cases of these pretty beads, but the caddises would not cooperate and so I was forced to supply them with their usual sand and pebbles.