In 1918 Joe entrerd into an agreement with The Countess for the Irish and international rights to her composition "A Battle Hymn". They were to split the profits 50/50 on the international market rights.
Historians say it is interesting that the Countess signed the agreement "Constance De Markievicz I.R.A. February 1918"
Joe also collaborated on the lament "Heroes and Martyrs" a further composition of the Countess.