Hi, Due to the years involved you would have to order the certs to be sure that these three are all siblings. For William Graham the year is 1941, for Eric the only one I could find is Alexander Eric 1937 and found 3 Margarets. Margaret 1950, Margaret Bone 1943, & Margaret Dougan 1934. All of these people are born Stranaer. Hope this helps, Kim
* if you have other info, I will look further