C. S. T. Calder

Charles Shaw Tyrie Calder
Calder 'sweetening' a drawing in 1947. He is adding finishing touches to the survey drawing (prepared with Kenneth Steer) of the broch at Dun An Ruigh Ruadh. Extract of RCAHMS image SC1121381.
Born	1 March 1891 Forfar
Died	December 1972 Auchterarder
Nationality	British
Occupation	Archaeologist, Architect, Architectural Historian, Draughtsman, Surveyor
Known for	Research into Neolithic sites in Shetland, contribution to work of RCAHMS from 1917–1960, development of survey and depiction techniques for illustration

Charles S. T. Calder (c. 1891 – December 1972) was a Scottish archaeologist who undertook extensive explorations from the 1920s to 1950s. He is best known for his explorations of Neolithic cairns and buildings in Shetland in the 1940s and 1950s, although his contribution to the investigative work and publications of RCAHMS during a period of over 40 years service cannot be overstated.

Charles S. T. Calder was born on 1 March 1891 in Forfar, and trained as an architect. In 1914 he joined the Royal Commission on the Ancient and Historical Monuments of Scotland (RCAHMS). Calder joined the Royal Engineers Territorial Force towards the end of World War I. He enlisted on 30 March 1918 and probably trained at Newark-on-Trent, Southwell, and the Curragh in Ireland. He saw some active service in France and Flanders with the 529th (East Riding) Field Company, Royal Engineers, although most of the fighting was over. He was promoted to Lieutenant on 30 September 1919, and soon after was demobilised.

From the mid-1920s through to the outbreak of World War II, Calder was active in the resurgence of studies of Neolithic sites in Scotland as Investigator in the RCAHMS, as were V. Gordon Childe, Walter Gordon Grant and J Graham Callander, Keeper of the National Museum of Antiquities. By 1931 he had become an Associate of the Edinburgh Architectural Association, while employed by H M Office of Works. In the 1930s he excavated two Iron Age roundhouses on the Calf of Eday, with the help of local men. He excavated other sites on Eday and the Calf of Eday in the late 1930s and prepared the first complete description of the Dwarfie Stane on Hoy.

World War II began in 1939. In 1940 Calder conducted an emergency excavation of a broch in Caithness before it was destroyed to make way for the new airport of RAF Skitten. He found a saddle quern, grain rubbers, dishes, knocking stones, pivot stones, anvils, tether stones, pot lids, pounders and smoothing stones, a pestle and a whorl. There were also fragments of circular querns dating after the Roman period. On 14 January 1941 it was noted that Calder had relinquished his rank as Lieutenant on enlistment into the ranks. The war ended in 1945. In 1949 it was noted that he had retired from the Territorial Army with the rank of Lieutenant (Honorary Captain).