I am also researching this family. In 1986 a family member visited England and took pictures of James and Susannah Blackmore's graves. I'm trying to find someone in the family who might have these pictures.
Please let me know if you have other information. Their son, Charles Blackmore (28 Dec 1862 to 12 March 1946) married Mary Ruth Morse (7 Nov 1853 to 4 Jan 1895). That is my connection.