The Commonwealth War Graves Commission gives the above certificate in memoriam of Robert Gooding Henson. His grave is on a small site near St Laurent-Blangy, about 3 or 4 kilometres north-east of Arras, at Hervin Farm British Cemetery. It appears that only 48 identified casualties are buried here. There are 51 in total, 3 of them unidentified. Given the lives lost at the battle, it'll be interesting to investigate why Robert was interred here in particular. What I do know so far is that the Allied front line ran through the village of St Laurent-Blangy until 9th April 1917. According to the CWGC website, "Hervin Farm was taken by the 9th (Scottish) Division on 9 April 1917 and the cemetery was made by fighting units and field ambulances in that month; three graves were added subsequently". Given that we know that Robert died on 22nd April, perhaps his grave is one of those added later.