Thanks JL for his book [Origin of civilization (1870)], which he has read with "extreme interest". Wishes JL had published four or five months earlier as CD would have "so profited & saved so much work". CD will have to modify some of what he has written [in Descent]. Sees they differ a good deal about moral sense "but hardly two men ever do agree on this perplexing subject".
JL's note of the 16th [see 7277] about the Census arrived too late for CD to answer.