Thanks correspondent for sending paper on molluscs.

Suggests modification in JBH’s experiment on formation of diamonds.

Speculates about chemical products of constituents of living organisms when subjected to heat and pressure.

Discusses possible case of inherited memory involving Pompilus. Cites similar example of electric eel.

Congratulates him on Mastodon discovery.

Thanks EH and Ernst Abbe in connection with microscope for his son [Francis].

CD is glad the portrait [of CD by John Collier] has been arranged; suggests dates, but feels he should have no say in the subscriptions or remuneration.

Thinks the Lakes are beautiful.

Is reading W. Graham’s The creed of science.