Sorry, Joe, but I don't like the combined Ard Tí Chuain/Quiet Land of Erin thread at all- it doesn't make sense and would be very confusing to a new reader, even with your notes about combined threads.A thread is like a conversation, where posters interact and refer to what has gone before. When two or more (as in this case) are lumped together, it is hard to tell who is referring to what, and hyperlinks which have been inserted to direct people to other information either give a blank or take you back to the same thread.
I can see that deletion of simply answered requests or refreshes could be justified, and that combining might possibly work with simpler threads, but not in this case.
If information is to be combined, then it has to be processed and summarised, which is what I believe you intend to happen to the DTStudy threads. Otherwise, I think threads should be left as they are, with cross- referencing hyperlinks added as neccessary, so readers can understand the chronology and the relationship between threads.
I hope you will understand that I'm not criticising your hard work, but that I don't think this is the way to go about organising the large amounts of information available here.
Noreen