Hardy lived in Harcourt Street, certainly in late Oct 1920
1920 Nov 21. Hardy was not in his room at when his execution squad came to his door (according to IRA documents)
WS822 49.: A very special effort was being made to contact and eliminate a famous British Intelligence Officer known as Hoppy Hardy. This man had been missed on Bloody Sunday.
WS380 Dave Nelligan (DMP Special Branch and IRA spy in Dublin Castle) An old man named, Carroll kept a locksmith's shop in Stoneybatter, a working-class quarter of the city. He had two sons, active Volunteers. Carroll had a visit from a British Army officer who warned him that if his sons did not surrender at the Castle before a given date he would be shot. Carroll. was found shot dead in his shop later. On his body was pinned a card: "Spies beware, I.R.A.". Tobin brought me a slip of paper and on it was written in Collins' writing: "Concentrate on Hardy". That was the name of the killer. MacNamara and myself knew this man well. Re was an Orangeman, with an artificial leg, on the Castle garrison and was an Intelligence Officer in the Auxiliaries and a very hostile killer. I told Tobin to send two men to the Castle next day and I would point out this man whom we knew lived in a city flat to which he cycled every morning. Joe Guilfoyle was at the gate next morning with a bicycle. Our man did not appear. After hours waiting I signalled Guilfoyle to go away. He cycled to the flat in Harcourt Street where he found Caldwell, another member of the Squad, standing on the Street. Guilfoyle told him to clear off as Hardy wee not coming out. As they moved off a lorry dashed up the Street. Several auxiliaries dismounted and placed the boys under arrest. They were brought to the Castle and put in a cell while their captors went for a drink. Hardy's wife had seen Caldwell hanging about and, fearing for her husband's safety, had 'phoned to the Castle in some pre-arranged phrase. Caldwell had in his pocket a note-book containing such entries as the index numbers of military and auxiliary motor cars and addressee of auxiliaries and military officers. Guilfoyle took it from him and swallowed it. They were interrogated, knocked about and taken for a midnight ride. They were released next day.