NessaF
I grew up in Westport, and I can recall my parents telling me that Rees lived in "Cherry Cottage" which is in Rosbeg. It is a beautiful house still. I think it may have operated as a Guest House once. Next time I am out that way I will take a photograph for you.
I have been to "Holy Trinity Cemetery" but have not noticed any headstone for Rees there. Its a very small cemetery quite near to the Church Of Ireland.
If I come across anything I will let you know