Got the second Irish DNA test result re my very hard to trace great granny born in Dublin in 1879. Another match, this time with the grandson of her much younger half brother - they shared the same father, who had two wives. So I can be totally confident in my Annie's mother AND father. Woot! It's also particularly nice for me, because this branch, in New Zealand, has a strong tradition of working in education, science (inc multiple PhDs) and even an early NZ computing prof (Annie's nephew). Quite a nice symmetry with my line. Original DNA blogpost here.
Thought some of my online friends might be interested in my blog post, which shows some of the potential of autosomal (all branches) DNA testing for cracking genealogical brick walls. I've made other DNA matches with cousins, but this is the first one that has proven a tricky-to-trace line.