1854 - 1883 (29 years)
| Thomas George Slack | |
| B: | 11 Apr 1903 |
| Lambton Co., Ontario | |
| D: | 14 May 1962 |
| Prince George, British Columbia | |
| Martha Musa Robertson | |
| B: | 7 Dec 1881 |
| Sarnia, Lambton, Ontario | |
| D: | 2 May 1945 |
| Turner Valley, Alberta | |
| Augustus Manford Slack | |
| B: | 19 Aug 1878 |
| Enniskillen Twp., Lambton, Ontario | |
| M: | 18 Jan 1902 |
| Lambton Co., Ontario | |
| D: | 2 May 1967 |
| Calgary, Alberta | |
| William John Roberton | |
| B: | 20 May 1883 |
| Lambton Co., Ontario | |
| D: | 10 Dec 1883 |
| Lambton Co., Ontario | |
|
| Mary Ann Rawson | |
| B: | 19 Aug 1854 |
| Scarborough, York, Ontario | |
| D: | 10 Dec 1883 |
| Lambton Co., Ontario | |
| John A. Roberton | |
| B: | Jul 1858 |
| Stirling, Lanarkshire, Scotland | |
| D: | 21 Oct 1922 |
| Edmonton, Alberta | |
