Searching for Information About Duncan Macarthur OR Mcarthur

From Bible records, I have a Duncan McArthur or MacArthur born 1 May 1745 in either upstate New York or Vermont. He married Mary Savage relative of John Savage, a known Loyalist. I've read accounts of Duncan and Mary accompanying John to Shefford,Quebec as refugees after the Revolutionary War. Some accounts list a Mary McArty widow of Duncan residing in Shefford.. I can't find anything about him, his parents name, siblings or country of origin (which I presume is Scotland)or any definitive death or burial information. I do know Mary and Duncan had at least one daughter, Elizabeth MacArthur/McArthur who married David Whalen. Their daughter, born between 1802 and 1810 married and moved from Vermont to Livingston County, Michigan.