My dear Sir
Excuse me for troubling you with one line as a suggestion, viz to collect hereafter all the facts on the changes in the skulls or skeletons of animals long confined, but not generated in menageries, & publish a short separate paper on subject.—2 I am pretty well read up on such subjects, & I believe the fact to be as new as it is surprising.—
In Haste | My dear Sir | Yours very faithfully | C. Darwin
Please cite as “DCP-LETT-5618F,” in Ɛpsilon: The Charles Darwin Collection accessed on