Hi,
I've found a marriage for Eleanor Watson in Shoreditch, Apr-Jun 1859, 1c 470 - there are 2 possible grooms, neither of them John Ince. There are 2 marriages for John Ince, in 1857 and 1858, but neither of them are to Eleanor Watson.
It might be worth buying the certificate for Eleanor's marriage, in case there was a mistake with the groom. (I looked at the John Ince ones in the register, so know that there wasn't a mistake with those, but couldn't find the EW marriage in the register, only in the index).