This is a very attractive personalized bookplate showing what appears to be a photograph of Mary Foster Nassau and her husband, Robert Hamill Nassau, who was both an ordained Presbyterian minister and medical doctor. Mary was his second wife who accompanied him to central Africa near the Ogowe River where they, along with Robert Nassau's sister, Isabelle, served as missionaries. Mary died in 1884. Her husband retired in Pennsylvania and in 1909 wrote a book titled "The Path She Trod: A Memorial of Mary Foster Nassau." Bookplate is clean and unused and measures 3-1/2" x 4-1/2". Very nice for a collector.