"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MD2K-RM9 : accessed 30 January 2016), Ulyssus G Buttler in household of Robert P Buttler, Troy, Iowa, Iowa, United States; citing enumeration district ED 208, sheet 240B, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0345; FHL microfilm 1,254,345.
"Montana, County Marriages, 1865-1950," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/F37W-XK9 : accessed 30 January 2016), W L Butler and Etta Vandecar, 05 Jan 1890; citing Marriage, Helena, Lewis and Clarke, Montana, county courthouses, Montana; FHL microfilm 1,906,338.
"Montana, County Births and Deaths, 1840-2004," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/QKNR-L8HW : accessed 30 January 2016), Ulysses S Butler in entry for Albert Earl Butler, 17 Dec 1891; citing Birth, Helena, Lewis and Clark, Montana, United States, various county recorder offices; FHL microfilm 2,314,615.
"Iowa Births and Christenings, 1830-1950," database, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XVGD-C46 : accessed 30 January 2016), Ulyssis S. Butler in entry for Barton Bennett Butler, ; citing Williamsburg, Iowa, Iowa; FHL microfilm 988,208.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M9K1-2MD : accessed 30 January 2016), Ulysis S Butler, Troy Township Williamsburg town, Iowa, Iowa, United States; citing sheet 6B, family 95, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,240,438.
"Iowa, County Births, 1880-1935", database, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XV6Z-G9H : accessed 30 January 2016), U. S. Butler in entry for Ivor Delos Butler, 1907.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MGM4-6D6 : accessed 30 January 2016), U S Butler, Troy, Iowa, Iowa, United States; citing enumeration district (ED) ED 53, sheet 6B, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,374,420.
"Iowa Marriages, 1809-1992," database, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XJ5K-N2F : accessed 30 January 2016), U. S. Butler in entry for Burton B. Butler and Hazel Ione Searles, 05 May 1916; citing Cedar Rapids, Linn, Iowa, reference 2:3JGK9F7; FHL microfilm 1,704,468.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KMY8-C1P : accessed 30 January 2016), U S Butler, Williamsburg, Troy Township, Iowa, Iowa, United States; citing enumeration district (ED) 48-21, sheet 5B, family 111, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 1168.