Question: When did Mary Dawson, Countess Of Dartrey's father die?
Sentence (from "Dudley FitzGerald-de Ros, 23rd Baron de Ros"): Dudley Charles FitzGerald-de Ros, 23rd Baron de Ros of Helmsley, (11 March 1827 – 29 April 1907) was a soldier, courtier and the premier Baron of England.
Relevant evidence: Yes