I think that birth certif is the way to go with it.
The only thing I found were 2 bapts for a Martha and Mary Hodgetts both bapt same day
parents William and Maria
Mary Hodgetts - International Genealogical Index
Female Christening: 09 MAY 1842 St Martin'S, Tipton, Stafford,
Martha Hodgetts - International Genealogical Index
Female Christening: 09 MAY 1842 St Martin'S, Tipton, Stafford,
let us know how you get on if you send for it Kathy

So unless otherwise advised this will be moved within 24 hrs to archived section and brought back when new info forthcoming or when required