Plate of lesion localization method with anatomical notes written by Lashley. Although Lashley was not the first to implement the lesioning approach, he was among the vanguard in terms of applying a rigorous method of localization. This image was provided courtesy of Roger K. Thomas, via his PhD Major Professor, Lelon (Lee) J. Peacock. In 1954, Peacock wrote Lashley and requested advice on mapping rat brain lesions. Lashley wrote about a 1.5 single spaced typed letter describing his method. He stated in the letter that he had never published on his method. Lashley included with the latter the hand-labeled diagram and a few blank diagrams. (Roger K. Thomas, personal communication; Thomas, 2007a)