Influential boogie-woogie piano player (1894-1955) best known for his ‘Cow Cow Blues.' DS, signed “Chas. Davenport,” one page, 5.5 x 9, April 15, 1926. Davenport authorizes the Vocalstyle Music Company to use his song ‘Poor Girl Blues’ in “the manufacture of its Vocalstyle Music Rolls” in exchange for royalties of four cents per roll. Signed at the conclusion by Davenport and a Vocalstyle secretary. In very good condition, with fragile storage folds with slight separations and some scattered toning.