Nicholas Briick - line 17
Source - Year: 1880; Census Place: Jesup, Buchanan, Iowa; Roll: 329; Family History Film: 1254329; Page: 581C; Enumeration District: 094; Image: 0463.
Nicholas Briick - line 22
Source - Year: 1885; Iowa State Census Collection, 1836-1925; Census Place: Perry, Buchanan, Iowa; Roll: IA1885_154; Image: 44
William Brennan - line 42
Source - Year: 1900; Census Place: Waterloo, Black Hawk, Iowa; Roll: T623_418; Page: 20A; Enumeration District: 22.
William Brennan - line 20
Source - Year: 1910; Census Place: Waterloo Ward 4, Black Hawk, Iowa; Roll: T624_392; Page: 16A; Enumeration District: 0026; Image: 911; FHL Number: 1374405.
Source - Year: 1915; Iowa State Census Collection, 1836-1925; Census Place: Waterloo, Black Hawk, Iowa; Roll: IA1915_35; Image: 3396