Published in Bulletin of The British Ornithologists' Club, in 1926, in volume 46, pages 57-58

Published in Bulletin of The British Ornithologists' Club, in 1926, in volume 46, pages 87-93

Published in Bulletin of The British Ornithologists' Club, in 1926, in volume 47, pages 28-32

Published in Bulletin of the British Ornithologists' Club, in 1926, in volume 47, pages 52-58

Published in Bulletin of the British Ornithologists' Club, in 1926, in volume 47, pages 70