Just to clear things up a bit. In the original version the use of DMP ie Dublin Metropolitan Police is used. In the Sean Mooney version DMG is used, mainly I think to keep the rhyming effect. It probably could also mean Dublin Metropolitan Gardai that were the police force who actually replaced the DMG. A government controlled police force was introduced into Dublin in 1786 and were an armed and uniformed force. It had a chequered history. It was replaced in 1795 by an unarmed force. The armed force was again brought back in 1799 and strengthened in 1805.The DMP itself was actually created in 1836.The force was amalgamated into the Garda Siochana in 1925. Mike