C. T. Ramsey, « Feeding Habits of Trout », New York, Recreation, vol. 54, n°6, juin 1916, p. 262.

The caddis-worm in particular, seems to be a favorite. My records reveal the fact that seventy per cent of the trout taken during that month contained much sand, bits of twigs, etc., being the remains of caddis-cases. And strange to say most of these trout were taken on the brown hackle ( with Peacok body), and ashen hacke (with orange wool body) – in the proportion of about three to one, favoring the brown hackle.