E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Hermit (The English).
Roger Crab. He subsisted at the expense of three farthings a week, or 3s. 3d. per annum. His food consisted of bran, herbs, roots, dock-leaves, mallows, and grass. Crab died in 1680.
