I am also researching Moses Buchanan/Lillias Angus. Here is what I have found:
Moses Buchanan was born Jan 31, 1734 to John Buchanan (b. approx 1701) and Elizabeth Buchan (b. approx 1705) in Drymen. Moses siblings include James (christened Dec 18, 1727) and Margaret (christened Jan 31, 1734, same date that Moses was born and christened). They were also born in Drymen. There may be more siblings that I have been unable to find.
Moses Buchanan married Lillias Angus (christened Mar 27, 1737in Baldernock) in 1861. They had seven sons and three daughters. I can only account for Walter (christened Mar 20, 1768), Andrew (christened Mar 11, 1770), William (christened Jun 14, 1772), Margaret (christened May 22, 1774), Lillias (christened May 5, 1776), and James (christened Nov 29, 1778). They were all born in Baldernock.
I would like to verify if this information or correct it if I am wrong. Any help would be appreciated, including info on Moses grandparents.
Dave