OK - so the first thing to look for is a birth index reference for Phoebe May Ward, in Ireland, in the period ending 1923 (women never overestimate their age!).
This should be straightforward: this would not be a common combination of names for any part of Ireland, so the search should produce either a single result, or no result at all.
As it happens, I shall probably be near a microfilm of the birth indexes tomorrow, so I might have the time to check.
Adrian