Will be glad to have SPW’s criticisms of Origin.
Discusses his use of terms, "typical" and "specialisation".
Emphasises large body of facts explained by his theory of species.
Regrets he cannot answer SPW’s questions.
Discusses antiquity of subaerial volcanoes.
Disagrees "entirely & absolutely" with L. von Buch’s "elevation-crater-theory".
Gives directions to Down. Would be happy to see SPW but regrets they "have no attractions".
Agrees about colonisation of Arctic region.
CD thought that his St Helena land shells had quite recently become embedded; his specimens are at the Geological Society.
Can SPW ask A. Günther for any references to Silurus escaping from the Danube?
Discusses transport of fish to Lake Constance by flooding.
