1915 - 1983 (67 år)
| Robert Elvill Lee Blackstone 1915-1983 |
| Robert Elvill Lee Blackstone | |
| F: | 23 Mar 1915 |
| Spokane County, Washington, USA | |
| D: | 23 Jan 1983 |
| Mesa, Maricopa County, Arizona, USA | |
| Mildred Jane Wigen 1917-2006 |
| Mildred Jane Wigen | |
| F: | 4 Mar 1917 |
| Vershire, Orange County, Vermont, USA | |
| V: | 17 Jul 1937 |
| Hill County, Montana, USA | |
| D: | 11 Aug 2006 |
| Chester, Liberty County, Montana, USA | |
