Is less certain of views in letter of 17 May [10963]. Asserts interest in explaining the presence of "speaking monkeys", which occur in higher as well as lower classes.

Lectured on Darwinism in Cincinnati, Minneapolis, Buffalo, and to 3500 people in New York City.

Despite close friendship with Cope and Hyatt and many explanations by the latter, he cannot understand their views.

Thanks CD for appreciation of his papers.