Photograph of the ceremony to celebrate the erection of a plaque at Braes of Foss, to commemorate Maskelyne's Schehallien Experiment of 1774, and a photograph of the plaque Sheet of two colour photographs (colour digital copies), annotated by Mr Stuart Leadstone. The first photograph shows Professor Jack Allen FRS, Sir Andrew Huxley PRS and Stuart Leadstone (15 April 1983); the second photograph shows the 'Royal Society plaque' at Braes of Foss (November 1983). Enclosed with MS/887/1. August 2011