Thanks Monica:-) I am starting from the name Margaret Kitchener Forbes as someone my mother might be connected to. I don't know anything else about her. When I searched for the name I came up with the one you found in 1915 in Perthshire. Since that is the only match I found anywhere, it seemed like this might be the person, since the dates match.
I want to find out, and I know it is a long shot, is if she might have worked in Elstree, London in about 1938.