Here is a Charles son of Monson G living in Port Greville Cumberland Co.1901 Census. Monson is an unusal name, too much of a coincidence?
http://automatedgenealogy.com/census/View.jsp?id=23245&h...Looks like Monson is from the US? 1891 Census Port Greville
http://www.collectionscanada.gc.ca/databases/census-1891/001... Here is the marriage of Arthir Monson G parent, Roland G who is the con of Charles Monson G.
https://www.novascotiagenealogy.com/ItemView.aspx?ImageFile=...http://www.wikitree.com/wiki/Green-2441Here is Charles Monson G's death. Father is Thomas, mother ? Pineo.
https://www.novascotiagenealogy.com/ItemView.aspx?ImageFile=...