TO C.LYELL.Down, [February] 18th [1860].
I send by this post Asa Gray, which seems to me very good, with the stamp of originality on it.

Also Bronn's "Jahrbuch fur Mineralogie." (95/1.

See Letter 93.) The united intellect of my family has vainly tried to make it out.

I never tried such confoundedly hard german; nor does it seem worth the labour.

He sticks to Priestley's Green Matter, and seems to think that till it can be shown how life arises it is no good showing how the forms of life arise.