I have now ascertained that Agnes Gamble's mother, Jane, registered the deaths of the twins and have found her death in Drumhirk, Kilmood in 1877. I have also found the death of a Jane Paisley in the same Drumhirk in 1864 aged 73, so she is a likely candidate for David Paisley's mother. I have seen the marriage certificate of Hugh Paisley and Eliza McMillen in 1846, Bangor, a week before David married Agnes Gamble. Hugh's witness was a David Paisley, whose signature is remarkably similar to that on my David's marriage certificate, with the same little circular loop over the P. There is a fly in the ointment, however. Hugh is a weaver of Conlig, who says his father is Robert Paisley, a labourer. I suspect this Hugh is my David's brother, reflected in the names of David's sons, but it seems odd that if they were brothers and Hugh knew his father's name, why didn't David? When Hugh remarries, he again says his father was Robert. I suppose it could suggest that Robert was dead, or more likely, Hugh and David could be cousins, not brothers, and David's father was the William of Drumhirk with the gun license between 1832-6. According to Familysearch, this Hugh died in Newtownards in 1876, but I cannot find him in the GRONI death registers, even with the variant search. Is it possible that some deaths weren't registered? It seems unlikely, I would have thought. I am now investigating Robert Paisley and Jane Wright, who, according to Derek Beattie's website had a Mary Jane in 1833 and a John in 1836, but there is no indication of where this information came from. I am unable to use the link Derek provides to contact him. Does anyone know a different way of contacting him?