American White Ibis, 1925

Series consists of birds, landscapes, and wild flower studies in watercolor on board and paper. Also included are several versions of an etching of a hummingbird and trumpet vine and color prints of two of Dingles watercolors produced by Atelier Graphique H. Vonfobel of Feldmeilen, Switzerland. Several works are unfinished and many contain handwritten text on the verso recording the species of bird or plant, its Latin name, a number, and a price.