I've looked for the birth of an Ada O and Ada Olive born in Portsmouth within 5 years each way of 1875 but there are none, which looks promising. In actual fact Ada Georgina Moth was born in the registration district of Alverstoke, Hampshire and on the 1881 & 1891 census it gives Gosport as her place of birth rather than Portsmouth but I realize this is a minor point. I can find no record of a marriage to either Charles Young or Manton Young around 1895 as on the 1911 census it states that they have been married for 16 years. On the 1901 census the transcription for Charles' employment was market man but looking at it, the second word does seem to be longer than just 'man'. So much work has gone into this mystery and it would be great if the summary was near enough correct. I suppose Charles Young could have a second name of 'Manton' but that doesn't explain the different places of birth. It seems to be getting even more complicated but that's the fun of it all.