- [S82] S. P. Kaler and R. H. Maring, History of Whitley County Indiana (Indianapolis, Indiana: B. F. Bowen & Co., 1907).
- [S83] Obituary, Perry M. Williamson, "Perry M. Williamson Dies Of Paralysis", South Whitley Tribune, South Whitley, Indiana, 3 June 1920.
- [S85] Obituary, Henry H. Williamson, South Whitley Tribune, South Whitley, Indiana, 5 February 1920.
- [S91] Stanton Williamson, Death Certificate, Register No. 4, State Office No. 3 6780 (3 June 1939), Michigan Department of Community Health, Vital Records Office, Lansing, Michigan. Information supplied by his wife, Julia Williamson, Glenn, Michigan. From Seeking Michigan (Lansing, Michigan: Michigan Historical Center), online database at http://seekingmichigan.org
- [S122] Nellie M. Raber, compiler, Marriage Records of Whitley County, Indiana, 1860-May 11, 1884 (Fort Wayne, Indiana: Fort Wayne Public Library, 1973).
- [S127] Marjorie J. Kite, compiler, The First 26 Years of Marriages in Whitley County, Indiana, 1838-1863 (North Manchester, Indiana: D. A. R., Dr. Manasseh Cutler Chapter, 1968).
- [S251] Obituary, Effa D. Plummer, "Mrs. Effa D. Plummer, Glenn Resident, Dies", The Commercial Record, Saugatuck, Michigan, 20 December 1957, p. 4, col. 7. Image from Saugatuck Area Obituaries (Saugatuck, Michigan: Saugatuck-Douglas History Center), at http://sdhistoricalsociety.net/research/SDHSWeb/ALLOBIT/…
- [S278] Whitley County Marriage Records, 1860-1869, Whitley County Courthouse, Columbia City, Indiana.
- [S290] Probate Records, Allegan Co., Michigan, File No. 14804; records for Jane Williamson. Photocopy in possession of Charles Towne, Brecksville, Ohio.
- [S291] Probate Records, Allegan Co., Michigan, File No. 19646; records for Stanton Williamson. Photocopy in possession of Charles Towne, Brecksville, Ohio.
- [S386] Will Records, Whitley Co., Indiana, Vol. 2, pp. 200-202; records for Keys C. Hamilton. Online at Ancestry, https://ancestry.com, Indiana, Wills and Probate Records, 1798-1999 / Whitley / Will Record, Vol 2-4, 1875-1913, Images 21,22.
- [S427] Deed Records, Whitley Co., Indiana, Vol. N, p. 292, 2 May 1863; FHL Film 1705502.
- [S1071] Leonidas E. and Effa D. Plummer Cemetery Marker, Plummerville Cemetery, Allegan Co., Michigan; photographed by Terry (Towne) Nugent and Ruth (Swikert) Towne.
- [S1094] Obituary, Alice Williamson, The News-Palladium, Benton Harbor, Michigan, 26 June 1953, p. 16. Image from News-Palladium (Benton Harbor, Michigan), (Provo, Utah: Ancestry.com Operations, Inc.), online database at http://ancestry.com
- [S1100] Obituary, Mrs. B. Williamson, "Ganges News", The Commercial Record, Saugatuck, Michigan, 12 December 1930, p. 5. Image from Saugatuck Area Obituaries (Saugatuck, Michigan: Saugatuck-Douglas History Center), at http://sdhistoricalsociety.net/research/SDHSWeb/ALLOBIT/…
- [S1119] Beniah and Jane H. Williamson Cemetery Marker, Taylor Cemetery, Allegan Co., Michigan; photographed by Charles Hancock and Chris Yoder, May 2008. Image from findagrave.com, Mem. No. 27255558.
- [S1415] 1900 U.S. Census, Ottis O. Williamson household, Ganges Twp., Allegan Co., Michigan, E.D. 9, p. 276 (stamped), p. 16A (written), dwelling 333, family 359, NARA Series/Roll T623/698. From ancestry.com.
- [S1416] 1900 U.S. Census, Stanton Williamson household, Ganges Twp., Allegan Co., Michigan, E.D. 9, p. 276 (stamped), p. 16A (written), dwelling 337, family 363, NARA Series/Roll T623/698. From ancestry.com.
- [S1418] 1900 U.S. Census, Beniah Williamson household, Ganges Twp., Allegan Co., Michigan, E.D. 9, p. 275 (stamped), p. 15A (written), dwelling 306, family 331, NARA Series/Roll T623/698. From ancestry.com.
- [S1428] 1910 U.S. Census, Leonidas Plummer household, Ganges Twp., Allegan Co., Michigan, E.D. 11, p. 15 (stamped), p. 15B (written), dwelling 380, family 383, NARA Series/Roll T624/634. From ancestry.com.
- [S1444] 1910 U.S. Census, Stanton Williamson household, Ganges Twp., Allegan Co., Michigan, E.D. 11, p. 7 (stamped), p. 7B (written), dwelling 172, family 174, NARA Series/Roll T624/634. From ancestry.com.
- [S1446] 1910 U.S. Census, Beniah Williamson household, Ganges Twp., Allegan Co., Michigan, E.D. 11, p. 8 (stamped), p. 8B (written), dwelling 198, family 200, NARA Series/Roll T624/634. From ancestry.com.
- [S1462] 1920 U.S. Census, Leonidas Plummer household, Ganges Twp., Allegan Co., Michigan, E.D. 14, p. 137 (stamped), p. 12A (written), dwelling 300, family 302, NARA Series/Roll T625/753. From ancestry.com.
- [S1463] 1920 U.S. Census, Beniah Williamson household, Ganges Twp., Allegan Co., Michigan, E.D. 14, p. 137 (stamped), p. 12A (written), dwelling 299, family 301, NARA Series/Roll T625/753. From ancestry.com.
- [S2066] 1860 U.S. Census, John Bider household, Cleveland Twp., Whitley Co., Indiana, p. 895 (stamped), p. 212 (written), dwelling 1524, family 1529, NARA Series/Roll M653/307. From ancestry.com.
- [S2067] 1870 U.S. Census, Beniah Williamson household, Cleveland Twp., Whitley Co., Indiana, p. 340 (stamped), p. 35 (written), dwelling 278, family 250, NARA Series/Roll M593/373. From ancestry.com.
- [S2096] 1930 U.S. Census, Jane Williamson household, Ganges Twp., Allegan Co., Michigan, E.D. 3-13, p. 144 (stamped), p. 12B (written), dwelling 312, family 314, NARA Series/Roll T626/972. From ancestry.com.
- [S2121] 1920 U.S. Census, Stanton Williamson household, Ward 2, Albion, Calhoun Co., Michigan, E.D. 29, p. 27 (stamped), p. 2A (written), dwelling 36, family 41, NARA Series/Roll T625/759. From ancestry.com.
- [S2122] 1930 U.S. Census, Stanton Williamson household, Ward 2, Albion, Calhoun Co., Michigan, E.D. 13-2, p. 27 (stamped), p. 7A (written), NARA Series/Roll T626/978. From ancestry.com.
- [S2123] 1910 U.S. Census, Ottis Williamson household, Ward 15, Denver, Denver Co., Colorado, E.D. 187, p. 53 (stamped), p. 7B (written), dwelling 172, family 176, NARA Series/Roll T624/118. From ancestry.com.
- [S2124] 1930 U.S. Census, Otis O. Williamson household, Ward 3, South Haven, Van Buren Co., Michigan, E.D. 80-30, p. 45 (stamped), p. 5A (written), dwelling 116, family 127, NARA Series/Roll T626/1029. From ancestry.com.
- [S2125] 1900 U.S. Census, Leonidas E. Plummer household, Ganges Twp., Allegan Co., Michigan, E.D. 9, p. 274 (stamped), p. 14B (written), dwelling 297, family 320, NARA Series/Roll T623/698. From ancestry.com.
- [S4286] Michigan, U.S., Marriage Records, 1867-1952 (Provo, Utah: Ancestry.com Operations, Inc., 2015), online database at https://ancestry.com
- [S5177] Jane Williamson, Death Certificate, Register No. 22, Cert. No. 3 3672 (30 December 1930), Michigan Department of Community Health, Vital Records Office, Lansing, Michigan. Information supplied by her daughter Mrs. Effie Plummer. From Seeking Michigan (Lansing, Michigan: Michigan Historical Center), online database at http://seekingmichigan.org
- [S6092] Deed Records, Whitley Co., Indiana, Vol. L, p. 336, 17 December 1860; FHL Film 1705501.
- [S6093] Deed Records, Whitley Co., Indiana, Vol. L, p. 606, 5 April 1859; FHL Film 1705501.
- [S6094] Deed Records, Whitley Co., Indiana, Vol. L, p. 607, 27 March 1860; FHL Film 1705501.
- [S6095] Deed Records, Whitley Co., Indiana, Vol. L, pp. 92,93, 10 March 1860; FHL Film 1705501.
- [S6096] Deed Records, Whitley Co., Indiana, Vol. N, p. 573, 2 May 1863; FHL Film 1705502.
- [S6098] Deed Records, Whitley Co., Indiana, Vol. N, p. 580, 2 May 1863; FHL Film 1705502.
- [S6099] Deed Records, Whitley Co., Indiana, Vol. O, p. 213, 2 May 1863; FHL Film 1705502.
- [S6100] Deed Records, Whitley Co., Indiana, Vol. O, p. 223, 29 March 1864; FHL Film 1705502.
- [S6101] Deed Records, Whitley Co., Indiana, Vol. O, p. 224, 29 March 1864; FHL Film 1705502.
- [S6102] Deed Records, Whitley Co., Indiana, Vol. P, p. 81, 15 October 1864; FHL Film 1705502.
- [S7773] 1940 U.S. Census, Ottis Williamson household, Ganges Twp., Allegan Co., Michigan, E.D. 3-14, p. 205 (stamped), p. 11A (written), line(s) 22-23, NARA Series/Roll T627/1721. Informant was Clara Williamson, wife. From ancestry.com.
- [S7774] Obituary, Ottis Oscar Williamson, The News-Palladium, Benton Harbor, Michigan, 17 March 1958, p. 8, col. 5. Image from Newspapers.com (Provo, Utah: Ancestry.com Operations Inc.), at http://newspapers.com
- [S7775] Obituary, Clifford Williamson, "Denver Youth of Bright Promise Commits Suicide", Denver Post, Denver, Colorado, 8 September 1910, p. 9, col. 2. Image from GenealogyBank (Naples, Florida: NewsBank, Inc.), at https://genealogybank.com
- [S7776] "Emulate Novels But Are Captured", Denver Post, Denver, Colorado, 2 July 1907, p. 5, col. 4. Image from GenealogyBank (Naples, Florida: NewsBank, Inc.), at https://genealogybank.com
- [S7784] "Probate Court Proceedings", The True Northerner, Paw Paw, Michigan, 7 February 1919, p. 2, col. 6. Image from Newspapers.com (Provo, Utah: Ancestry.com Operations Inc.), at http://newspapers.com
- [S7790] World War II Draft Card, Clifford Kenneth Williamson, Local Board 1, Paw Paw, Van Buren Co., Michigan. Image from U.S., World War II Draft Cards Young Men, 1940-1947 (Provo, Utah: Ancestry.com Operations, Inc., 2011), online database at http://ancestry.com