His murderer, a Fenian acting under the instructions of the secret society to which he belonged, was discovered, and executed in 1869.
A prison erected here at this period gave place later to the House of Detention, notorious as the scene of a Fenian outrage in 1867, when it was sought to release certain prisoners by blowing up part of the building.
The same course was adopted in Ireland in 1866 during a Fenian rising.