Boston College tapes. It's in ED Moloney's "Voices from the Grave Book" on Hughes which I have in font of me. It nwas a couple of weeks after the first H-Block went up. Hughes said it was a way of softening the pows up before the new Maze system. McGrogan told Hughes that his mission was to poison top Republicans in prison, and this was just after Lenny Murphy poisoned his cell mate.
As a Republican just thinking about it gives me chills more than the MRF, E4A, SAS or the Glenanne Gang.
Just to clarify I'm not a dissident Republican I just believe in some of the core Republican values (some) & defend the wars (1969 - 98) , (1919 -23) & (36 - 39)
Does the 1956/62 Border Campaign not rate inclusion in your list of "wars"?