Dugmore Radclyffe, Wild Life and the Camera, Philadelphie, J. B. Lippincott, 1912, p. 195-196

At last I took a very small bare hook and baited it with a clump of the stick-like larvae of the caddis-fly, which were just about ready to hatch. This proved most alluring, and within an hour I had landed a number of trout, some of which were fine big fellows. Some days later I tried the same experiment with equal success when flies were disdained.