Beautiful study of swan "Circles" 1912 by J C Warburg 1867-1931. from a vintage copy of Photograms of the Year 1912.

J. C. (John Cimon) Warburg was born in 1867 in Paddington is an area within the City of Westminster, in central London. John Warburg educated at home because of ill health, he was first attracted to photography by an exhibit of James Craig Annan's work.
The child of a wealthy family, John Warburg the brother of fellow photographer Agnes Warburg, pursued many interests: music, linguistics, and entomology. He took up photography in about 1880 and was soon writing numerous articles for German and English publications. Joining RPS in 1895, John Warburg was elected to its council in 1913 and to fellowship in 1916, also serving on several committees.
John Warburg lectured and wrote extensively on the process and showed Autochromes at the annual RPS exhibition for twenty years. He worked in the pictorial style, chiefly using platinum and gum bichromate processes. He also produced many autochrome transparencies (1907). Although his earlier work was realistic (the 1880s), he worked in an Impressionist style for the remainder of his career.