Several years ago I stumbled across a bit of fishing lore in a second-century bc work by the Greek writer Aelian. “Between Boroca and Thessalonica runs a river called the Astracus, and in it there are fish with spotted skins [trout].” He then describes a “snare for the fish, by which they get the better of them. They fastened crimson red wool round a hook and attached two feathers. Then they would throw their snare, and the fish, attracted by the color, comes up, thinking to get a mouthful” (On the Nature of Animals).

Fishermen still use this lure today. It…