Denis O’Neill and the road to Béal na Bláth

The collection contains four files relating to Denis “Sonny” O’Neill of 35 Mitchell Street, Nenagh, County Tipperary. One of these files is very likely unique. It is Department of Defence file 2/21085. This file was first compiled by Intelligence Branch of the National Army on Denis O’Neill, a native of Maryboro, Timoleague, Co Cork, in…