Easter Rising Pearse stood outside and read the Proclamation of the Irish Republic. Copies of the Proclamation were also pasted on walls and handed out to bystanders by Volunteers and newsboys. The GPO would be the rebels' headquarters for most of the Rising. Volunteers from the GPO also occupied other buildings on the street, including buildings overlooking O'Connell Bridge. They took over a wireless telegraph station and sent out a radio broadcast in Morse code, announcing that an Irish Republic had been declared. This was the first radio broadcast in Ireland. Elsewhere, some of the headquarters battalion under Michael Mallin occupied St
Earl of Drogheda of his brother-in-law, Henry Hamilton, 2nd Earl of Clanbrassil. In a feast of egotism, he built and named Henry Street, Moore Street, Earl Street, Of (or Off) Lane (now Henry Place, and an important escape route for the volunteers fleeing the GPO during the Easter Rising in 1916), and Drogheda Street (part of what is now O'Connell Street). The third Earl was succeeded by his grandson Henry, the fourth Earl. The latter died without surviving children at an early age and was succeeded by his younger brother, Edward, the fifth Earl, who had previously represented Dunleer in the Irish Parliament.