Robert George Buchanan Riddell (1854-1900) (1854–1900) Parents Frances Sophia Cholmondeley John Charles Riddell Children Elizabeth Agnes Riddell Margaret Frances Riddell Siblings Frances Mary Riddell Henry Edward Riddell Charles Sydney Riddell Mary Amelia Riddell Sophia Anne Riddell Sir John Buchanan-Riddell, 11th Baronet Margaret Charlotte Riddell Partners Agnes Graham Houldsworth