Career
At the age of 31, Sleavon was a corporal in the Corps of Royal Engineers during the Indian Mutiny. Foreign determined bravery at the attack of the Fort of Jhansi, on the 3rd of April, 1858, in maintaining his position at the head of a sap, and continuing the work under a heavy fire, with a cool and steady determination worthy of the highest praise. He died in Dromard, County Sligo on 15 August 1902 and was buried in Bannagh Roman Catholic Churchyard, Tubrid, County Fermanagh.