Diarmaid O'Duinn (MKA Marc Carlson), of the Barony of Northkeep, Kingdom of Ansteorra. Polymath or annoying know-it-all, opinions differ. He as researched and written over 60 web pages on topics as wide ranging as period shoe making, clothing, leatherworking, horning, timelines of places both real and ficticious, Greenland, witch trials, various religious topics and sundry modern mundane historical events. He has been a frequent contributor to various SCA 'net sites under the names Diarmaid O'Duinn, Diarmait ua Dhuinn, Diarmauit ui Dhuinn, and Dermot O'Donn, as well as under his mundane name.
Web pages of interest include: Footwear of the Middle Ages: http://www.personal.utulsa.edu/~marc-carlson/shoe/SHOEHOME.HTM Some Clothing of the Middle Ages: http://www.personal.utulsa.edu/~marc-carlson/cloth/bockhome.html Leather Working in the Middle Ages: http://www.personal.utulsa.edu/~marc-carlson/leather/leath.html Using and Working with Horn: http://www.personal.utulsa.edu/~marc-carlson/horn/hornhome.html
His base page at: http://www.personal.utulsa.edu/~marc-carlson/