Joan Florence Helen Ryder (1897-1986) (1897–1986) Parents Constance Eugenia Smith Algernon Charles Dudley Ryder Children Mary Rosalind Francis Felicia Pollock Siblings Mary Constance Eugenia Ryder Cecily Blanche Dorothy Ryder Dorothy Evelyn Frances Ryder Algernon Frederick Roland Dudley Ryder Hugh Granville Leveson Dudley Ryder Philippa Constance Marian Ryder Partners Bertram Pollock