On the familysearch site theres also a possible marriage in Westmeath, Ireland -
William Green to Catherine Heely - Athlone, Westmeath, Ireland - c1820 (no exact date)

William's Parents - Thomas Green and Rebecca Houlms
Catherines father - Daniel Heely
Williams date of death 15/03/1877
Regards
Catherine
ps. theres also the christenings of William and Catherine's children, including a Jane in Westmeath, Ireland 1821 and some in Selston, Notts