I have a marriage certificate for William Corteen aged 30 and Lucy Mastin aged 21 in Sheffield in 1877. William seems to have been a bit of an inventer and quite eccentric. His father is Robert Corteen, a bootmaker, deceased. Lucy Mastin remarries around 1900 and I can find no trace of either William or his father. It is thought both originally came from the Island. Can anyone help on this?