Catalogue of the First Portion of the Highly Important Collection of Etchings and Engravings Formed by that Well-known Amateur H. S. Theobald,... Comprising Etchings by D. Y. Cameron, Sir F. Seymour Haden, P. Helleu... and Others of the Modern School, and Mezzotints by Frank Short, which Will be Sold by Auction by Messrs. Christie, Manson & Woods ... on Tuesday, April 12, 1910 and Following Day ...