Colonel Henry Halcro Johnston, CB, CBE D.Sc, MD, CM, DL (1856-1939)
Henry Halcro Johnston was President of the Orkney Natural History Society from 1927 to 1931.
Johnston, of Orphir House, studied surgery at Edinburgh University; then worked in the Army Medical Department serving in the Sudan, the North West Frontier and South Africa.
He did important work on medical sanitation, and had charge of army hospitals in the Glasgow area during World War I.
A distinguished botanist, his collection of 4,000 Orkney plants is held at the Botanical Gardens, Edinburgh.
His botanical notebooks, diaries and letters are available for study at the Orkney Library and Archives in Kirkwall.
Some of his collection and more information about him are available at Stromness Museum.
As a young man, Johnston was capped as a Scotland rugby international.