1916 - 1995 (78 years)
| Roy Corwin Clark |  | | B: | 25 Jul 1916 | | P: | Adams, Illinois | | D: | 31 May 1995 | | P: | Macomb, Illinois |
| | Thomas Andrew Clark | | | B: | 3 Mar 1876 | | P: | Clayton, Adams, Illinois, USA | | M: | 7 Feb 1909 | | P: | Camp Point, Adams, Illinois, USA | | D: | 19 Jun 1948 | | P: | Illinois |
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| Ethel Estella Gruny | | | B: | 14 May 1885 | | P: | Camp Point, Adams, Illinois, USA | | D: | 28 Dec 1967 | | P: | Camp Point, Illinois,USA |
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