I too am descended from this family, through William's brother Alexander, who had married in 1842 Isabella Strachan in Edinburgh. Alexander was a watchmaker and remained with his wife in Edinburgh having six children by her till her death in 1854 from childbirth complications. He subsequently emmigrated to Richmond about 1857, and was remarried in 1861 to Elizabeth Mason, who bore him at least one son, Elias, and Alexander opperated a merchantile enterprise, jewlery/watchmaker's shop, in Richmond Town.
William and his wife Janet Wilson settled next to his father John on Lot 26 in the 13th Concession of Shipton Twp. Richmond Co. Quebec. They both had 75 acres and in 1851 John had his block house with 16 1/2 acres cultivated and 58 1/2 wild, while William also had a block house with 22 acres cultivated and 53 wild. At that time John's daughter Jane and son-in-law Robert Jackson, who had married prior to emmigration, were living with him, and still co-habitating in 1861. William's wife died 18 March 1879 and was buried on the 21st by the Prebyterians (Free Kirk of Scotland) in Maple Gove Cemetery, Richmond.
Her family too was settled nearby in the next Concession, 14, on Lot 24, and living in their block house in 1851, were: the father Andrew Wilson ae 67, the mother Janet ae 63, and three of their children: Margaret ae 28, Andrew Jr. ae 27, Thomas ae 20, and Isabella Caters (not family) ae 19. William was recorded as a widower in 1881, but he is not present in the 1891 census, I assume he died in the interim. Their first son Andrew was born there in 1843; Helen in 1845; Janet, 1847; William, 1850; Alexander, 1853; Thomas W, 1856; and John 1866. The first three children were christened in the Congragational Church, but Thomas was christened in the Free Kirk (Presbyterian).
I have a fair bit of info of this family and am interested in meeting and collaborating with other family researchers. :o)