Published in Bulletin of The British Ornithologists' Club, in 1936, in volume 56, pages 70-71

Published in Bulletin of The British Ornithologists' Club, in 1936, in volume 56, pages 99-100

Published in Bulletin of The British Ornithologists' Club, in 1936, in volume 57, pages 7-8

Published in Bulletin of The British Ornithologists' Club, in 1936, in volume 57, pages 42-43