Who was Mrs Larbey, and what was her reaction after the murder?

I have provided the only mention of Mrs. Larbey below;

These deeds are written in history, and there are records wherein one may read the details of them. There one may learn of the shooting of Policemen Hunt and Evans because they had ventured to arrest two members of the society—a double outrage planned at the Vermissa lodge and carried out in cold blood upon two helpless and disarmed men. There also one may read of the shooting of Mrs. Larbey when she was nursing her husband, who had been beaten almost to death by orders of Boss McGinty. The killing of the elder Jenkins, shortly followed by that of his brother, the mutilation of James Murdoch, the blowing up of the Staphouse family, and the murder of the Stendals all followed hard upon one another in the same terrible winter.