CD approves of HES’s "laws" [of nomenclature]. Regrets that [J. E.?] Gray does not approve of the scheme. CD has sent the paper to William Ogilby and suggests that HES send it to G. R. Waterhouse, of whom he has a high opinion.

CD saw Andrew Smith, who is interested in the subject [of zoological nomenclature], but CD thinks he differs from HES on some points. Sends Smith’s address.

Comments on HES’s Report ["Report of a committee … (on) nomenclature of zoology", Rep. BAAS 12 (1842): 105–21]. Suggests limit be put to changing names that are only partially erroneous to prevent those who detect the error from coining new names and attaching their own. HES’s rule for "authority for a species" is difficult, though on the whole best. Suggests stating it boldly to prevent appropriation of species names by "tacker[s] of two old names together".

Congratulates HES on producing an authoritative document [BAAS committee report on zoological nomenclature].

Has been to N. Wales looking at glacier traces described by W. Buckland, which are most interesting and clear. Has written an article on what he saw ["Ancient glaciers of Caernarvonshire" (1842), Collected papers 1: 163–71].