Mary Jane Sedgwick  [Thomas Sedgwick / Mary Lonsdale]
b. 1848 Melbourne, Victoria1 (#15854)
m. 1869, George Bell

George Bell  [parents unknown]

Children:

Margaret Anne Bell
  b. 1871, St Kilda, Victoria1 (#5731)
  d. 1893, St Kilda, Victoria1 (#16120)
  m. 1891, William A Coates1 (#6643)
John Edward Bell
  b. 1872, St Kilda, Victoria1 (#19965)
  d. 1952, Parkville, Victoria1 (#1842)
  m. 1900, Mary Cumming1 (#7408)
Mary Jane Bell
  b. 1874, St Kilda, Victoria1 (#19496)
Frances Jane Bell
  b. 1875, Brunswick, Victoria1 (#14297)
  d. 1905, Melbourne, Victoria1 (#6385)
Joseph Alfred Bell
  b. 1882, St Kilda, Victoria1 (#26070)
  d. 1946, Melbourne, Victoria1 (#4518)
  never married
Ernest James Bell
  b. 1887, St Kilda, Victoria1 (#24144)
  d. 1947, Melbourne, Victoria1 (#5240)
  m. 1908, Margaret McReady1 (#9330)
Charles Arthur Bell
  b. 1889, St Kilda, Victoria1 (#26618)

There is also a listing for one

George Bell [Mary Jane Sedgwick / James Bell]
  b. 1868, Brunswick, Victoria1 (#21868)
  d. 1898, St Kilda, Victoria1 (#4981)
  m. 1889, Brunswick, Victoria, Mary Hanson1 (#292)
Was James George's brother? Was he George?

Sources:

1. Victorian Government Registration Records

Have more data? genealogy@sedgwick.org