Still can't find anything for a marriage for Sarah Jane. Robert Willis and George Cochlan(sic) both of Kitley Township were witnesses to the marriage of John Coghlan, 26, farmer, born in and living in Kitley Township, s/o Charles and Evice Coghlan, when he married Delight Lewis 3 Jan 1871 at Frankville.
The family of Charles Coghlan included a Sarah Jane. On the 1851 census, under Cochlan, they are in Kitley Township, Leeds and Grenville County. Charles(47) and Avis(33) are both born Ireland and the children born in Ontario. George(11), John( 8 ), Mary Ann (4), Sarah (3), David (1) and Ann Cochlan(17) b. Ireland, servant.
In 1861 the family under Cocklan are still in Kitley Township. Sarah now is enumerated under Sarah J. (11) and the family has grown to include Charles(7), Susan E.(5), Davis(3) and Fanny(1). In 1871 they are still in Kitley but everyone is now shown as born Ireland. Charles Coghlan and his wife plus Mary Ann(23), David(21), Charles(17), Susan Elizabeth(15), A??(13), Fanny(11) and Emaline Louisa(5). The next household is son George(29) and wife Catherine(21) and daughter Mary Rosella 3/12. Mary married under Mary Ella to Edward Elvidge 5 June 1894 Lanark County and she was shown as the daughter of George Coghlan and Catherine Joynt.
George Coghlan, farmer, died 25 Oct 1887 of consumption - 2 years at age 46 years, 2 mos, 17 days. Born Kitley Township.
David Coghlan, 33, b. Kitley Township, farmer s/o Charles and Avice Coghlan married Silas Challis, 30, b. Kitley Sept 17, 1884 Lombardy, Lanark County. Wit: A. Coghlan of Kitley
Under Willes there is a birth for Maud July 9, 1877 d/o Robert Willes, merchant and Sarah Jane Coghlan in the Township of Oxford, Grenville County.
Emmeline Louisa Coghlan died Dec 20, 1890 @ 23 of consumption (11 months). Born and died Kitley Township. Informant father Charles Coghlan.
Mrs. Coghlan died at 78, Aug 1, 1894 Kitley township Leeds, Concession #3, farmer's widow, born Ireland, cardiace failure 24 hours, informant - a doctor.
Not sure if you want more information on this family of Coghlans or not. Hopefully someone else has better luck at finding a marriage registration for Sarah Jane.
Debbie