Wow, that's a knotty one!

I thought the Pooles and Robertses must be interrelated more than once.
All I know about Peter and Hester Poole is what has come to light so far on this thread

But from a newcomer's point of view, it looks to me as if your Christopher's mother, Anne Poole Roberts, is the sister of William Poole (husband of Hester). So Christopher would be Peter and Hester Poole's nephew.
For children of Peter Poole and Hester Owens, I found on IGI:
JANE christened 17 Aug 1815 The Old Or John Wynnes Chapel (that's my Jane)
MARIA chr. 20 Nov 1818 The Old Or John Wynnes Chapel
then to Peter Poole and "Ester Jones" - is this the same person?
PETER chr. 11 Jul 1821 Tre Logan Calvinistic Methodist, Llanasa
ELIZABETH chr. 09 Mar 1824 Tre Logan Calvinistic Methodist, Llanasa
Maria, Peter and Elizabeth are all with Peter and Hester at Graig in 1841; Jane, the oldest has gone into service in Manchester
And talking of thickening plots
According to Pauls post last week, one of Peter and Hester Poole's marriage witnesses was Robert Roberts. My William Roberts (that married Jane Poole in Manchester) put Robert Roberts down as his father on his marriage cert...
I'll have to draw a diagram for this lot!

Barbara