Thanks for AD’s letter.
Owen has published a paper on the brain in relation to the mouth ["On the homology of the conario-hypophysial tract", J. Linn. Soc. Lond. (Zool.) 16 (1881–2): 131–49]. CD cannot avoid suspicion that the original idea was borrowed from AD.
F. M. Balfour very ill. His death would be a great loss.