Captain John Warneford Armstrong, the descendant of a Scotch settler in Ireland, was at heart a supporter of oligarchical principles, but acted so well the part of a flaming patriot, that Byrne, a democratic bookseller, led Armstrong to his private room and presented him to Sheares as 'a true brother on whom you may implicitly depend.' Henry declined to hold converse unless in presence of his brother John. Armstrong said he would wait until John came. Conversation, however, had commenced before his arrival; he at length appeared with Byrne, and the latter introduced Armstrong in an equally impressive way. Armstrong deposed on the trial that John Sheares said--'I know your principles very well,' and asked him to join the cause by action as he had already done by inclination. Armstrong replied--'I am ready to do everything in my power for it, and if you can show me how I can assist I will serve you to the utmost.' John, an impulsive youth, said that the best way he could help was to gain over the soldiery, and confer with him as to the best way of seizing the royal camp. Armstrong appointed to meet him at Baggot Street with this end; he did so, and on Sunday night, May 13, paid another visit--both brothers being present. On the 15th he called twice; John Sheares said he would like to introduce him to a friend of his, Surgeon (afterwards General) Lawless, with whom he might consult and advise in his absence--he [John] being obliged to go down and organise Cork. All this time Henry Sheares is found reticent, and at some of the interviews he was not present at all. However, on Thursday, the 17th, both brothers appeared to this apparently zealous convert to their cause; Lawless was also by, and (according to Armstrong's testimony) said: 'He had lately attended a meeting of deputies from almost all the militia regiments, at which meeting there were two of his [the approver's] men.' Henry Sheares, now familiar with Armstrong as his guest and constant visitor, let fall some remarks by which the betrayer succeeded in implicating him as having knowledge of the military organisation. This was not enough for Armstrong; that evening he returned to their house. Henry did not appear; John came down and obtained a written introduction from him to a sergeant in his regiment, known to be a United Irishman. The most sickening part of this story has yet to be told. Armstrong continued to worm himself into the hearts of his victims. He accepted their invitations to dinner, mingled with their family, listened to Mrs. Sheares singing at the harp for his entertainment, and, as Curran declared, fondled on his knee the child of the man whom he had marked for doom!