Finds his grief over his daughter Anne’s death still strong.

Is following Lyell’s advice about publishing his species doctrine. It is not to be a sketch, however, but as perfect as his 19 years of work will allow. His work on pigeons has been invaluable on many points. "No subject gives me so much trouble as means of dispersal of terrestrial production in the oceanic islands."

Finds "most remarkable differences" in skeletons of rabbits.

Has taken birds with seeds in crops to Zoological Society and fed them to eagles and owls. Pellets with seeds in perfect condition were "thrown up" in 18 and 16 hours, showing an effective means of distribution.

Asks WDF to write to his nephew in Jamaica to try experiments with floating lizards’ and snakes’ eggs in sea-water, to see if they survive.