Chromolithographic oval print of Robert E. Lee, from a Matthew Brady photo. This one was done soon after Lee’s death in 1870. Several were framed and illegally sold as oil paintings. They were made by several printers, such as Hoover in Philadelphia and H.A. Thomas of New York. Chromolithography became the most successful of several methods of color printing developed in the 19th century, and was developed by lithographers who sought to find a way to print on flat surfaces with the use of chemicals instead of relief printing. Ca. 1870, Item # 2006.0703.256, 41 x 30 cm.