I have a lot of information on the Kilner family.
I am not sure how many posts one has to make before being able to send Personal Messages - is it 3? If you can do this then I can send you what I have and we can compare notes.
For Ruth Kilner and her husband George Clay, I do not have certificates but a lot of census information on them and their 11 children:
Benjamin, born 1850/1
Ann Amelia, born 1852/3
John William, born 1855/6
Harriet, born 1858/9
Clara, born 1859/60
George Arthur, born 1862/3
Fred, born 1864/5
Laura, born 1866/7
Walter, born 1868/9 - I believe he died in 1880
Herbert, born 1869/70
Wilfred, born 1873/4
I also have a grandson, Cecil Alexander Clay born 1896/7, of unknown parentage as he was living with his grandmother Ruth - an illegitimate child of one of the daughters?
I have not been able to confirm if Mary Kilner (nee Singleton) remarried.