My descent is from Patrick Milroy a younger bother born 1669. Another brother Gilbert known as the covenanter was deported to Jamaica for 10 years.
I think the family house you refer to is Waukmills near Kirkcowan where a Mrs Molly Parker (nee Milroy)lives. I haven't actually met her but was in that area a couple of weeks ago. The Waukmill Milroys are a different line from John the Wigtown martyr but have a common ancester in John Milroy b c 1600 in Kirkcowan.
Do you have a Milroy connection?@ I've got quite an extensive Milroy family tree and would be happy to share information.