As 3rd Royal Irish came to Mount Brown, a section of Ceannt's battalion under section commander John Joyce opened fire, killing a number of soldiers. The British could not break through to Dublin Castle, and so brought up more troops from Kilmainham Barracks. A ceasefire allowed casualty retrieval. The Volunteers drove back repeated assaults from determined regimental attacks. Ceannt used a contingent at the Marrowbone Lane Distillery to enfilade the passing soldiers; grinding attacks broke through to the Women's Infirmary. On Tuesday 25 April, the British could have closed off the battle, but failed to press home the advantage when the 4th Royal Dublin Fusiliers arrived, and Ceannt continued to hold out with 20 times fewer men. On Thursday 27 April, a British battalion made south, as far as the Rialto Bridge, when Ceannt's outposts opened fire.