Shortly after his return, Marshall was asked by Earle Clapp, head of the Forest Service's Branch of Research, to help initiate badly needed reforms in the forest-products industry and to create a broader vision of national forest management. Marshall moved to Washington, D.C. in September 1932 to assume the appointed position, which entailed writing initiatives for forest recreation. He immediately began compiling a list of the remaining roadless areas in the United States. He sent this data to regional foresters, urging them to set aside areas for wilderness; all of them responded negatively. Marshall's contributions to what became known as the Copeland Report amounted to three extensive chapters of a two-volume, 1,677-page work. He considered it "the best piece of forestry work I have yet done."