Dear Moor,
[...]
Darwin, by the way, whom I’m reading just now, is absolutely splendid. There was one aspect of teleology that had yet to be demolished, and that has now been done. Never before has so grandiose an attempt been made to demonstrate historical evolution in Nature, and certainly never to such good effect. [...]
Warm regards to your wife and children. Your F. E. (Engels to Marx, 11 or 12 December 1859.)