The Skinner family and the Longmore family are indeed related. In fact to inherit under his uncle's (matthew? skinner's)will, Samuel James Longmore had to change his name to Skinner and adopt the coat of arms. If you google in (under google books) there is a very detailed full view of the book 'A few memories of the right rev R B Skinner 'by allan McLean Skinner dated 1860. Also, I think we forget (or at least I do!) how common it was for cousins to marry each other in those days. In my own family, apart from the Longmores. there are Holders and Eltons marrying cousins, and of two siblings from one family marrying two siblings from another.