Before I post the details of your look-up, I must say that this marriage is recorded in the register for 'The Parish of Paddington', un-named. St James, Sussex Gardens, wasn't built until 1843, previous to that the parish church was St Mary's on Paddington Green. The LMA and Westminster Archives use the name St James because when the two churches merged into the one parish in 1843, St James was where all the older registers were sent to and have been catalogued as that.
The marriage is also indexed on the IGI at
www.familysearch.orgFrom the marriage register, Parish of Paddington
Charles Ward of this parish bachelor
and Isabella Janet Cheston of thsi parish spinster
were married in this church by banns
this 9th day of February in the year 1836
by me I G Gifford, Curate
This marriage was solumnized between us
C Ward's X mark
Isabel Jennet Cheston (signed her name, note the spelling)
in the presence of
W
m Hogg (signed his name)
Mary Walker's X mark
Hope this helps
Dawn