T. C.Hofland, The British angler’s manual, Londres, H.G Bohn, 1848, p. 14.

The cadis, or cad- bait, and straw-worm

« is covered with a case or husk or straw, bark, bits of rushes, particles of gravels, and with this covering to shelter it, is enabled, by protuding its head, to creep on the botton of the water , where it is found »