An excerpt from a letter to Mrs. Donaldson, found in Charles Hamilton Galleries: Auction No. 117, 18 January 1979, p. 37, item 85. The first sentence was quoted also in American Book-Prices Current, Vol. 85: 1978–1979 (New York: Bancroft and Parkman, 1979), p. 1,020.

"I shall be immensely interested in the albino rats, but I hope I may be allowed also to be interested in the human portion of the household? I could not answer sooner as my time was fully taken up by our General Election, now happily at an end...."