Source: Cuthbertson, Article 31. Dublin, 1768.

"A picker being often useful to a soldier for cleaning the touch-hole of his firelock, in the firings, one of strong wire should be fixed, by a small chain, to the edge of his pouch-belt, under the front buckle, and as close to the pouch as possible but never to hang in view, as it might be troublesome, in raising the flaps of the pouch, to take out a cartridge."