Asks JP to remember him if anything occurs to him "in regard to inheritance at corresponding or rather earlier ages". Sends JP a few examples for his "Chronometry of life". CD is sure he often met with striking facts but he disregarded them. "Deviations alone would have struck me."

Effects of different climates on breeding periods.

Thanks JP for bearing in mind his strong wish to learn any facts on inheritance at corresponding ages, and on correlation of growth.

JP’s case of teeth affected by syphilitic parents seems very curious. Would like to hear a few particulars when they meet.