Championed as one of the gentlest and most calming of field sports, angling has had its notable votaries throughout its history, from Isaak Walton to Horatio Nelson. In this charming book on the pleasures of fly fishing, the eminent chemist Sir Humphry Davy (1778-1829) adds his name to the list. He assigns his often poetic arguments to an imaginary cast of four friends, some of whom adore the sport while others question its morality as they embark...