He was awarded the Victoria Cross for his actions on 30 November 1917 in the Cambrai Sector, France, which led to his death.
He stood on the parapet with the telephone under a tremendous bombardment, observing the enemy and continued to send back valuable information until the wire was cut by his orders.
The extraordinary coolness of this heroic officer and the accuracy of his information enabled dispositions to be made just in time to save the line and avert disaster.There is a memorial to Walter Napleton Stone in Greenwich Cemetery, south-east London.
On the largest are the names of Walter's parents, and underneath the inscription: His actual grave has never been located and he is commemorated on the Cambrai Memorial to the Missing.
Stone VC DSO MC" is listed on the parish war memorial in the Trinity Chapel of St Mary's Church, Shrewsbury.