K. G. Semper’s article ["On the relationship of the Vertebrata and Annelida", Ann. & Mag. Nat. Hist. 15 (1875): 94–5] is ill-natured. Misinterprets facts already discovered by F. M. Balfour.

Has been working on Amphioxus. Puts his theory of vertebrate skulls on firm footing at last.

Is writing confidentially not to justify the passage referred to [see 9759], which he much regrets, but to state facts. He never intended any personal hostility to [George] Darwin and seeks advice about how to make reparation.

Thanks THH and Hooker for defending George Darwin against Mivart’s libel.

Entirely sympathises with CD about Mivart’s attack on George. THH has had a letter from Mivart in which he pleads guilty, but THH has decided there is no patching the matter up. Advises against doing anything unless Mivart takes initiative.

A severe letter of rebuke to Mivart for his attack on G. H. Darwin.

THH’s letter to Mivart is "tremendous". CD’s feelings and intentions about the matter.

If THH has made out homology of the skull, it is grandest discovery in years.

A confidential letter explaining in detail the extent to which he regrets his attack upon [George] Darwin’s article.