Letters from Joan Cross's brother Joe (Joseph E Cross, born 1894).
Two of the letters are on paper headed 'National Liberal Club, Whitehall Palace'.
Joan would have grown up thinking of him as her cousin.
The E may stand for Esop which was their mother's maiden name (Annie Maud Cross, born Esop 1864).
See also file ref no. CRS/3/126 fro further letters from Joe/Joseph as well as Cross's other brothers.