Hi Reiver
have you seen the baptisms of two daughters of Riddell and Ann on the IGI?
Anna Robson born 7th August 1815, baptized 10th Aug 1815, at St Andrew's RC church, Newcastle
Joan Riddell Robson bap 1st November 1816 at Newcastle (no church named)
If they were Roman Catholics, that might give you a clue where to look for the younger Riddell.
Judy
