Could this be her?

CATHERINE MATILDA CORKILL
Christening: 22 MAR 1863 Saint Mathews, Douglas, Isle Of Man
Father: WM CORKILL
Mother: MATILDA

This was before Civil Registration in the IOM, so the birth wouldn't be registered.

You could order the film of the parish register to see whether other details were included, through the Family History Centres of the LDS Church. Film no. 0106186

Sue