Late to the party here, sorry, but interesting to see Emmanuel Kisby come up here! Are you a descendant of Emmanuel and Jane, Spencer?
Having studied the Kisbys in Whittlesey and Coates for over 20 years, my hunch is Emmanuel's parents may be John and Ann Kisby, who baptised a son Levi Kisby on 20 Oct 1799 in St Mary's Church, Whittlesey. I have never found a baptism record for Emmanuel, but maybe John and Ann had moved into the area? Levi named his first son John, his second son Robert (after the in-law) and his third son Emanuel.
A burial of a John Kisby is recorded in Whittlesey in 1802 and a burial of an Ann Kisby, widow, is recorded in 1804. These may be the same John and Ann, but the priest at St Mary's church wasn't exactly generous with his information in that period, so difficult to conclusively prove.
There was also a William Kisby, born circa 1795, living with his family in the area at the time of the 1841 census. His first three sons were named John, William and Levi. Possibly (but no proof) William was another brother of Levi (1799) and therefore a son of John/Ann. I believe William and family emigrated to Illinois, USA in the 1840s - coincidentally (or maybe not) Levi (1799)'s children Emanuel, Levi and Sarah emigrated to Illinois in the early 1850s. Perhaps they were following their uncle William, who knows?
Anyway, hope that helps somewhat.