Hello Emer, you come from a great family, your great Aunt made a Witness Statement, no 441, a copy is in the National Archives, Bishop Street, Dublin,it is not on-line yet but you could order a copy. I have a W.S. no. 715 made by Colonel Frank Saurin, who was a member of G.H.Q. Intelligence, he mentions Lily Mermin, quote-
One of my chief agents was a Miss Lily Mermin, a cousin of Piaras Beaslai. She was a typist in Dublin Castle and did typing work for Collins at 118 Clonliffe Road, the home of Pat Moynihan. Moynihan was a postal official in the Sorting Office, Rotunda Rink, and was the agent who gave us the information which led to the various raids on enemy mails. In addition to Lily Mermin being one of our agents at Dublin Castle, she was also attached to me for visiting hotel lounges and the like for spotting and identification work of enemy personnel who used to frequent such places.She and my wife used to attend whist drives run by F. Company Auxiliaries in Dublin Castle. It was usual for one or two of the Auxiliaries to see the ladies to the tram.I followed from outside the Castle, all the time taking a mental description of the men- height, colour, features, clothes, etc. Subsequently I was given their names, rank and official position. un-quote.
She was a truly remarkable lady, I also have books written by P. Beaslai, hope you find this of interest.
C.S.M.