Mary BURNS b c1856 Glin Co Limerick

I have Terence Cussens and his wife Mary on the 1911 English census. Both give their place of birth as Glin Co Limerick. I think Mary's maiden name was Burns, but cannot find their marriage to confirm. In 1911 Terence is aged 56 and Mary 55, so their years of birth are c1855 and c1856 respectively. Can anyone help me with other details about them?

Many thanks. Graham