I don't know if you've seen them, but the Balquhidder census records for Hugh's brother John confirm the tree, as it gives his mother Janet's age in 1841 as 63, and he is living with his aunts Mary and Betty in 1851, and Betty in 1861. Mary and Betty's death certificates give their parents as Robert and Margaret McLaren. So, this means that in the family of John and Janet, one of them is from the family of Robert and Margaret McLaren, given Janet's age of 63 in 1841, it is most likely her baptised 1777, and not John baptised 1781.
