Hi Mary and Sonas,
First of all, many thanks for replying - it is really good of you and as always, I am extremely appreciative.
Sonas, you have brought to my attention something which is right at the centre of this issue; I never considered for a moment that the compositions of the dioceses would have changed. Please, where did you get this info from? This alters everything, because it now seems likely that they were indeed C of I and not RC and that I have been barking up the wrong tree! If it was not for you, then I would have continued in this. Can't tell you how grateful I am to you.
Mary, Another huge thank you for that wonderful info, especially re Guilford - this is a name which is in my family. Also, bearing in mind the crucial info that Sonas has imparted, I still think that the 1809 marriage might still be in Vol IV, the only difference is that the Diocese of Cork and Ross will be C of I and not RC.
It would be great if Casey confirms this.
Thanking you both once more,
Chris