Later correspondence and writings on Haldane including correspondence with R.W. Clark re his biography of Haldane. Includes some manuscript notes by Darlington, 1966-1967.

Also included here is correspondence with the Secretary, John Innes, re Haldane's 'programme' for the Institute in 1936 (possibly the document at MS. Darlington c. 108/J.76), 1968.