My line is down from William Alexander, supposed brother to your Archibald. Some of us in this line have formed an informal forum and several have done DNA. I was wondering if anyone in your line had done this and if so, their findings? Also, I noted that Google has digitized the book on the House of Alexander by Rev. Charles Rogers. All of you would be interested in its contents. Go to Google Books.
Helen Smithhelensm@hot.rr.com reserching Alexanders of Somerset and Cecil Co Maryland