It wasn't this one, was it?

May God be with those noble hearts,
May heaven be their home,
They never feared the RUC,                                          Or B-Specials on patrol,
In Brookeborough town, they were shot down,
In a cabin they lay cold,
O'Hanlon from old Monaghan town,
Sean South of Garryowen.

By Pat McManus, died in Cavan in 1958.

Source; "Saoirse"