Dry-Fly Fishing in Theory and Practice
 Dry-Fly Fishing in Theory and Practice (1889) is British author and angler Frederic M. Halford's second and most influential book on dry-fly fishing. It followed Floating Flies and How to Dress Them (1886) and this pair of books initiated some 40 years of a rigid and sometimes dogmatic school the Halfordian school of dry-fly fishing especially on English chalk streams. The work also played a significant role in the development of dry-fly fishing in America.