William Sedgwick   [Richard Sedgwick / Eleanor Eglin]
b. August 19, 1827, Sedbergh, Yorkshire, England
m. abt 1854, [Waukesha County, Wisconsin], Elizabeth Unknown1
immigrated to Waukesha County, Wisconsin with father about 18496

Elizabeth Unknown  [parents unknown]
b. abt 1835, England1

Census Records:

1850 Wisconsin, Waukesha, Lisbon
1860 Wisconsin, Waukesha, Merton
1870 Wisconsin, Waukesha, Merton
1880 Wisconsin, Waukesha, Merton
Widow Elizabeth with son Richard:
1900 Wisconsin, Waukesha, Merton

Children:

Eleanor Sedgwick
  b. abt 1857, Wisconsin1
Richard Sedgwick
  b. November 1859, Wisconsin1
  m. abt 1885, [Wisconsin], Minnie Martin1
Elizabeth Sedgwick
  b. abt 1868, Wisconsin1
  d. August 21, 1881, Waukesha County, Wisconsin3
Arthur W Sedgwick
  b. abt 1875, Wisconsin1
  d. March 21, 1881, Waukesha County, Wisconsin3

Sources and notes:

1. Census records, any of those indicated.

2. Wisconsin Deaths, 1820-1907
an Ancestry.com database
These records:
NameDeath DateCountyVolPageReelImageSequence #
Leizzie M Sedgurick21 Aug 1881Waukesha0100951341090352337
Arthur W Sedgwick21 Mar 1881Waukesha0100961341096352338

6. History of Waukesha County [Wisconsin]; bio of Richard Sedgwick (b. 1840)
Western Historical Company, Chicago 1880