Wilfred Mark Webb, The Heritage of Dress : Being notes on the history and evolution of clothes . Londres, E. Grant Richards, 1907.

Here and there in the animal kingdom we find that creatures protect themselves from injury by building up cases and coverings from extraneous materials, and these may very well be compared with the armour and clothes of mankind . […]
The caddis worms, or larva of some caddis fly, builds its home of sticks and stones or twigs, and thereby not only preserves its soft body from injury, but also harmonizes with its surroundings, in the same way as does the soldier on active service in time of war.