His family moved to another house near the corner of Old Youghal Road and Ballyhooly Road.
He lived through the famine and became an ardent nationalist.
Under Dillon's supervision the Fenian recruits drilled on the Fair Field and at Rathpeacon and were hoping for a rebellion in 1865 when the Fenians were at their strongest.
Arrest and Imprisonment
In September of 1865, police arrested Fenian leaders James Stephens and O'Donovan Rossa in Dublin, and Brian Dillon in Cork. The police searched Dillon's home and found a pair of field glasses, some drawings, and some incriminating letters sewn into the mattress of his bed.
On the 18th December, Dillon and another Fenian, Lynch, were tried together in the dock in Cork Courthouse by Judge Keogh, and he brought in a verdict of guilty and sentenced Brian Dillon to ten years penal servitude.
He was brought under armed guard by train from Cork to Dublin and then thrown into Mountjoy Gaol. He spent nearly a month there and suffered a lot from lack of sleep. In January 1866 Dillon and John Casey (the Galtee Boy) were handcuffed together on the tough and rough sea crossing between Kingstown and Holyhead. On arrival at Holyhead they were then taken by train to Pentonville Prison. This was a very cold prison and Dillon became seriously ill in May 1866. He was transferred to the hospital wing of Woking Convict Prison and this was to be his home for the next four and a half years. Here he became Convict Number 2658.
Homecoming and Death
In 1870, after five years imprisonment, a commission was set up to investigate the Fenian prisoners, and on account of his bad health, this commission recommended that Dillon be allowed home to Cork. In January 1871 he was transferred to Millbank Prison London, and two weeks later on the 8th February he was set free. The following day he arrived in Dublin and after a few days rest, he returned to Cork by train. All along the route thousands of people waited on the platforms to greet him, and read special addresses of welcome. The train reached Cork at 8.00 p.m and even though a carriage and pair were waiting, he was glad to seek refuge in the first covered car he could find, so dense was the crowd all around him, willing to shake his hand. The triumphal procession from the station to his home then began, and the hills all along the route were lighted with tar barrels.
Amid emotional scenes Brian Dillon met his family, and afterwards appeared at one of the windows of the house and thanked the people of Ireland for the great reception he had received everywhere on his journey home to Cork. Brian was now in very poor health and his mother began the task of nursing him. Everything that loving care and money could do was done, and from New York came a cheque for £50 from the generous-hearted O Donovan Rossa. Other friends too contributed, but all to no avail.On Saturday August 17th, 1872, Brian Dillon died at his home, surrounded by his sorrowing relatives.
Dillon's funeral was one of the biggest ever seen in Cork. The cortege was headed by the Barrack Street Band, and at least ten other bands took part. All had their instruments dressed in sombre black. On Monday August 18th, his remains were privately borne to St. Joseph’s cemetery, to a temporary resting place, as it was decided to build a vault in the family burial ground in Rathcooney, and this would not be ready for a few days. Later the funeral route travelled from Turners Cross along Anglesea Street, South Mall, Grand Parade, Patrick Street, McCurtain Street and St. Luke’s. The funeral procession stopped outside his home and prayers were recited for the repose of the hero’s soul. Then the procession moved on towards Ballyvolane, and up the steep hill, towards the graveyard at Rathcooney. O arrival at the newly built tomb, so dense was the crowd that milled around the hearse, that considerable difficulty was experienced in getting the coffin to the grave. Then the priests read the burial service, and in a hushed silence, Canon Freeman asked the entire assembly to kneel and recite the Lord’s Prayer aloud. He blessed the grave and the mortal remains of Brian Dillon were lowered to rest. The coffin was then covered, and after Colonel Richard O Sullivan Burke’s oration, the crowd quietly dispersed. The drama of Brian Dillon was over.
Today his name is inscribed in the National Monument on the Grand Parade and in street names like Brian Dillon Park and Brian Dillon Crescent. The Brian Dillons G.A.A. club in Cork City is also named after him.