Letter to James Cossar Ewart from James Ritchie, 10 June 1931

Ritchie wonders if Ewart's research on plumage could be furthered by examining the succession of plumage in, for instance, a diving duck such as the Eider, as it is near enough to the mallard to promise results but not near enough to suggest identity of development. He then requests a copy of Ewart's portrait to hang in his office at Aberdeen University 'to commemorate your holding of the Aberdeen Chair'.