So glad to have found someone else researching the family :)
Margaret Dunseith was my 4th Great Grandmother g-g-g-g Grandmother. We were up at Desertlyn Cemetry recently to visit the graves and see where the ancestors lay. I live in Moneymore so am not to far from it.
Where are you located? Are there any other living relatives you know of?
What information do you have, do you have any pictures or anything?
Hopefully we can share and swap information :)
I really really look forward to speaking to you, my email is firstname.lastname@example.org