Actually Gordon was influenced by Fred Halford from England,There is a reason why Roscoe is know as trout town USA, even out West...
1886-1892
In this period, George Marryat was Halfor’d brilliant, non-literary collaborator in the development and propagation of the dry fly and its dressings. Their work was based on careful entomological studies of the English chalk streams.
Theodore Gordon
1890, in America
Theodore Gordon, a finely talented angler—in mid life, in delicate health, and of straitened means—retired early to the Neversink River in New York’s Catskills. There he became the dean and grand master of American fly fishing and fly tiers. On February 22, 1890, Gordon received from Englan’d Frederick Halford a full set of Halford’s revolutionary dry flies. These flies and correspondence with Halford started Gordon on the way to defining the dry fly for America, though he steadfastly refused Halford’s dry-fly purism. His Quill Gordon pattern became the premier American dry fly and the first in a line of Catskill School trout flies representative of American insects. Gordon gave the dry fly both an American home and character. His seminal and delightful “Notes” were published in England’s Fishing Gazette and later in the American Forest and Stream.
1890-1920
During this period, the Catskill mountain streams of New York, under the inspiration and technical virtuosity of Theodore Gordon, came into ascendancy as the center and model of American fly fishing.