Has sent GdeS’s drawing to Hooker. He, Oliver, and Thiselton-Dyer have been perplexed by it.

L. Lesquereux’s discoveries in the Cincinnati Lower Silurian beds.

The Permian fossil sent by GdeS has stirred up the Kew botanists. Hooker suggests it was a Ceratopteris.

It would be false to pretend he cares very much about his election to the Institut.

Glad to hear GdeS plans to publish a work on the more ancient fossil plants. Hopes he will report also on the more recent Tertiary forms because the close gradation of such forms is "a fact of paramount importance for the principle of evolution".

Thanks for GdeS’s Le monde des plantes [1879].

CD has just read "Végétation polaire" [C. R. Congr. Int. Sci. Geogr. 1 (1878): 197–242] with interest. Hooker gave it conspicuous place in his Royal Society Address (1878).

Discusses the difficulty of reconstructing angiosperm phylogeny.

Discovery of polar fossil plants helps explain migrations.

Hooker has identification of GdeS’s Permian fossil.

Congratulations on election to the French Academy of Sciences, Botany Section.