I had given up. I hired David Dobson for a small fortune and he found nothing. Hired genealogists on this side of the lake and they found nothing. Went to Edinborough, both the libraries and the Stewart Society, and found nothing conclusive. The Appin clan did not reply to my queries. I have some interesting original, hand-made family trees on parchment with notes in the margins that the staff at the Stewart Soc. gave me (please don't turn them in).
As of five years ago, none of the surviving male Duncan Stewart descendants would submit to DNA testing.
I had taken a prolonged break until your email appeared.
Thanks for the surprise and your interest. Pam Gould