Elizabeth Posthuma Simcoe 1766-1850 The wife of the first Lieutenant-Governor of Upper Canada, Elizabeth Posthuma Gwillim was born at Whitchurch, Herefordshire, England. Orphaned at birth, she lived with her uncle, Admiral Samuel Graves, and subsequently married his god-son, John Graves Simcoe. She accompanied her husband to Upper Canada where she travelled extensively. Her diaries and sketches, compiled during these years, provide a vivid description and invaluable record of the colony's early life. In 1794, near this site, Mrs. Simcoe and her husband erected a summer house which they named "Castle Frank" in honour of their son. Returning to England in 1796, Mrs. Simcoe devoted her later years to charitable work. She is buried beside her husband at Wolford Chapel, Devon.

see Toronto Plaques: Elizabeth Posthuma Simcoe