Hi,
 been looking at the 1871  Garths Heads Ragged and Industrial School cencus.
The Mary Giblin on there was born 1859 ( my mary could have got her age wrong  on marrage certificate , then got it wrong on every cencus after - 

  ) 
I think it says birth place Yorkshire.
The Catherine  Giblin is born 1863 Newcastle upon Tyne   ( right age and place but wrong name ) 
DAYS BUILDINGs -Newcastle 1871 cencus - again this mary is born  1859 - father james  ( I suppose John could also be called Jack - know by other ancestors what name they were born with wasnt always what they were know by)
looked up all giblins born on the birth index - non before 1850 -  Hackstaples post about Irish link  could be right  -  

Radcliff - I like the idea of Mary living in a cellar under the Town Hall - non of my ancestors have done anything interesting yet  

Trai