Image courtesy of Public Record Office of Northern Ireland Flickr photostream.
Eamon De Valera has escaped from Lincoln Prison, along with two companions (Sean Milroy and Sean McGarry).  De Valera had assisted the prison chaplain at the weekly mass, and was able to take advantage of this role to make a replica key in secret. De Valera and his companions were helped to escape by Reublican activists outside the prison, including Michael Collins and Harry Boland. Police in Westminister are on alert, in case De Valera attempts to enter the Houses of Parliament as an MP, asserting parliamentary immunity.