“In memory of IRA volunteers Gerard Crossan, Tom McCann, Tony Lewis, John [Sean] Johnston, who died while on active service on the 9th March 1972 at 32 Clonard St. Erected by the Greater Clonard Ex-Prisoners Association.” The four died in a premature explosion (“active service”) presumably at the home of Lewis, who lived in Clonard Street. Crossan and Johnston were 19, McCann and Lewis were 20 (The Troubles 11).