Easter Family in Essex

I am trying to trace an Easter family, but I have very few details to go on.
My GGG Gradnmother was Ann Easter born about 1830 Braintree Essex according to censuses. At some point she married William Gardiner, but I have never been able to find the marriage. There are 5 children born in Faversham Kent who have their births registered, Adelaide Amelia, Ada Amelia, Walter James, Rosa Mary and Annie Maria, born 1868 to 1876.
There are siblings older than this but I can find no birth registrations for any of them. I believe my GG Grandad Arthur Edgar was born 2nd June 1866 but not sure where. Then previous to that:
Alice Elizabeth about 1864 Sittingbourne Kent
Edward about 1861 Gravesend Kent
Joseph about 1859 Gravesend Kent
John Thomas about 1857 Blue Town Sheppey Kent
William about 1854 Sheppey Kent
Ellen about 1852 Queenborough Sheppey Kent

The places of birth are according to censuses, and no baptisms can be found either.

The father William Gardiner is also claimed to have been born in Braintree Essex. Ann died in Whitstable Kent in 1910 a widow, but her husbands death is another missing certificate entry so far but is dead by 1891.

If anyone has any part of this tree I would greatly appreciate any help with the family.