My old tree software was not too hot with sources and I have yet to revisit these in my new one (RootsMagic 4) which is great for entering sources, so some of what follows is explained from memory. Feel free to edit this down to suit your Lismore-realted theme, but if you were feeling masochistic I could build up the tree for you in nauseating detail.
Mary Buchanan was born on Lismore at the beginning of the 19th century, about 1804 based on her age at various 19th Century censuses.
It is not clear who her parents were since there are a couple of contenders [one in 1801 other in 1806 if I remember correctly] but she was born at either Balimakillichan or Killean.
On 5 June 1832 she married John McColl from Kilmelford. He was a shoemaker, with his croft on Campbell of Melfort land, she a dairymaid working for Melfort. In 1838 Melfort sold the land and John and Mary walked to Glasgow with their three Kilmelford-born children Angus Buchanan (b 30 Jun 1834), Christian (b 7 Dec 1835) and Duncan Buchanan (b 4 Sep 1838).
In 1841 we find them at 46 Commerce Street, Gorbals, Glasgow with the three children, Christian renamed Christina but known as Christie. Their fourth child John Buchanan McColl was born on 12 November that year in Glasgow.
In 1842 they set off for Canada and settled in Aldborough, Elgin County, Ontario where three of John’s older siblings had gone during the previous 25 years.
John carried on nominally as a shoemaker but in reality as a farmer and died in 1872. Mary died in 1892 in Toronto being pre-deceased by her husband John who also died in Toronto. [The older children had grown and flown, but they were still living on the farm with young John in 1871—I wasn’t aware that old John had died in Toronto]
Of their children, Angus, a varnish manufacturer married Mary Leonard who claimed to be a relative of William Cowper, the poet, and they had three children: Alfred Walpole (b 13 Jul 1867), C. Clare (b 6 Jan 1874), and Ernest Leonard (b 20 Dec 1880).
Angus died in Mt Pleasant, York County, Toronto in 1916. [I see you have found the large memorial erected in 1908! Angus had been a teacher and a travelling salesman for seeds. He and John started the varnishes and oils business together, but Angus bought himself out later. The business went from strength to strength as McColl Brothers and then McColl Frontenac. I am Ernest Leonard McColl’s grandson]
Christina married Donald McGugan and she died in 1873. They had three children Mary Catherine (b 1864), W Arthur (b 1868) and John Duncan (b 1873). I assume that as Christie and young John died not far apart their deaths were related.
Duncan Buchanan McColl married Catherine Wigle (Weigele) and they had four children, Lewis Everton (b 1865), Marion Victoria (b 27 ec 1867) and Clarence Victor (b 26 Nov 1869). Clarence died at 9 weeks. Duncan died in 1870. [“Vera L” = Vera Lydia Lucinda, she was Lewis Everton McColl’s daughter b 1894]
John Buchanan McColl, their youngest son, married Emma Wolfe on 12 May 1880. He was an oil merchant. They had six children: John Wolfe (b 31 Dec 1881), William Frederick Gordon (28 Jun 1884-31 Mar 1886), Dorothy Miriam (b 17 Feb 1888), Monica Kathleen (b24 Jun 1889), Brian Bedingfield (b 31 Mar 1892) and Naomi Pauline (b 2 Aug 1894). John died in 1918.