Hi, I think that you may be related to Professor John Carolan who was shot during a raid in his home called Fernside in October 1920. We live in Australia but I have been researching this story as my mother in law, who was Christina (Chris) Levey at the time, was Professor Carolan's sister in law. His wife Bridget ( nee Leavey - the spellings of their surname varies in many records) was Christina's much older sister and Christina lived with them at that time. I started out writing up this incident as part of our family history to leave for our children and grandchildren but I have got very involved in the research and I think (hope?) my writing up will become quite a story in itself.
Margaret Emily Fleming ( nee Carolan) was Professor John's sister - as far as my research as told me - and I think she may well be your grandmother? I have found an article in the newspapers of the time of her death and it all seems to tally with facts you have given about your grandmother
Could you let me know if I am correct in thinking that your grandmother and Professor Carolan's sister are one and the same? If so would you be interested in sharing any family information about his family with me and I in turn would be more that happy to share any information, articles etc with you, although being a much closer relative you may well have more than I.
regards
Marian and Ken Donnelly Sydney Australia