A big muster of Volunteers was held in Castlebar on St. Patrick‘s Day, 1916, and was addressed by Mellows and The O’Rahilly. After the public meeting was held in the street, a
meeting of selected persona was held in premises in the town. This meeting was not attended by Volunteer officers only. I suspect that the I.R.B. had some of their men at that meeting. As far as I could see there was a good sprinkling of Volunteers who had no officer
rank at the meeting. Both Mellows and O’Rahilly hinted pointedly that a rising with arms was in the offing. They said that a testing time was coming and that it was up to each person to do a man’s part.
Bureau of Military History testimony of Richard Walsh, Irish Volunteer Organiser, 1916-1919