This manuscript, 10 lines of text signed, from Principles of Mathematics, p. 102, was found taped to the back of the Punch cartoon by Ronald Searle in a copy of the issue of 27 March 1957. The cartoon is in an oversize folder made by Conservation.

These lines and the cartoon were published in Farley and Hodgson, The Life of Bertrand Russell in Pictures and His Own Words, pp. 88, 89.