Francis St Leger Greer was the son of Capt. Joseph Henry and Mary Greer of Grange, Moy. He was born about 1894 at the Curragh, Co. Kildare. Francis was raised by his grandmother Agnes Isabella Greer in Moy, County Tyrone. He was educated at Eton. He gained the rank of 2nd Lieutenant in the service of the 16th Lancers. By February 1917, Frank Greer had been attached to the bombing section of the Irish Guards. Francis was awarded the Military Cross for conspicuous gallantry and devotion to duty. He led three platoons in the advance under very heavy fire. At one point in the advance he shot an enemy machine gunner at about 80 yards, silencing the gun and saving many casualties. Later, he did fine work consolidating the position won. Lieutenant Greer was serving with the 2nd Battalion of the he Irish Guards when he died on the 1st February 1917 aged 23.
Mericourt-l'Abbe is a village approximately 19 kilometres north-east of Amiens and 10 kilometres south-west of Albert. Heilly Station Cemetery is about 2 kilometres south-west of Mericourt-l'Abbe, on the south side of the road to Corbie.