1. Matilda 5, 6
2. Minerva 5, 6
3. Walton 5
4. Eleanor "Ella" 6, 10
5. Charles 6, 10, 11
6. Elbert 10, 11

He was counted twice in the 1850 census. Once with his parents (11) and once with his brother, Gilbert Z. Avery. (4)

1. Darlene Lewis, “William Rufus Hyde Avery-Mary Polly Tousley family group sheet” supplied 27 October 2003 by Lewis (Arcadia, OH). This sheet offers only one source for the information given.
2. William R. H. Avery household, 1910 U.S. census, Wood County, Ohio, population schedule, Plain township, enumeration district [ED] 205, supervisor’s district [SD] 8, sheet 9B, dwelling 121, family 121; National Archives micropublication T624, roll 1240.
3. William R. H. Avery household, 1900 U.S. census, Wood County, Ohio, population schedule, Plain township, supervisor’s district [SD] 207, enumeration district [ED] 155, sheet 11B, page 139, dwelling 228, family 229; National Archives micropublication T623, roll 1334.
4. Gilbert Z. Avery household, 1850 U.S. census, Wood County, Ohio, population schedule, Plain township, district 154, page 312, dwelling 687, family 709; National Archives micropublication M432, roll 741.
5. Wm. Avery household, 1860 U.S. census, Wood County, Ohio, population schedule, Plain township, Bowling Green post office, page 243, sheet 56, dwelling 409, family 397; National Archives micropublication M653, roll 1053.
6. W. R. H. Avery household, 1870 U.S. census, Wood County, Ohio, population schedule, Plain township, Bowling Green post office, page 6, dwelling 46, family 47; National Archives micropublication M593, roll 1283.
7. R. Craig Kammerer, “Mahlon Meeker,” email message from <rcraigk@optonline.net> (Basking Ridge, NJ) to author, 19 December 2002.
8. Wood County Chapter of the Ohio Genealogical Society, compiler, Union Hill Cemetery, Plain Township, Wood County, Ohio. (Apollo, Pennsylvania: Closson Press, 1993), 56.
9. Wm. R. H. Avery household, 1880 U.S. census, Wood County, Ohio, population schedule, Plain township, enumeration district [ED] 98, supervisor’s district [SD] 1, sheet 1, dwelling 6, family 6; National Archives micropublication T9, roll 1078.
10. Wood County Chapter of the Ohio Genealogical Society, compiler, Probate Birth Records, Wood County, Ohio, Volume I, 1867-1880 (Apollo, Pennsylvania: Closson Press, 2003).
11. William R. Avery household, 1850 U. S. census, Medina County, Ohio, population schedule, Medina township, page 210, dwelling 824, family 826; National Archives micropublication M432, roll 709.
12. Wm. R. H. Avery obituary, The Daily Sentinel-Tribune, Bowling Green, Ohio, 21 January 1916, p 1, col 6.
13. Wood County Record of Marriages, Volume 3, page 166, Court of Common Pleas, Probate Division, Bowling Green, Ohio.