Grace Forester (1878-1973) is a daughter of Lady Georgiana Peel, who was herself a daughter of Lord John Russell and his first wife, Lady Ribblesdale. Grace married first Joseph Wingfield Henry, divorcing in 1916. She married 2nd,  Lt.-Col. Hon. Francis Henry Cecil Weld Forester. The Henrys' daughter, Joan Henry, was born in 1914 (with a twin), and died in 2000.

Forester wants to know whether BR liked "Mama's book", probably Recollections of Lady Georgiana Peel, edited by Grace's cousin, Ethel Portal.