I wonder if he saw it?
Bill Williams, my Dad. He was Ordnance Officer to the 19th Division which saw action on the Somme.
If not 100 years ago today, then certainly later he would have seen these beast in action. It must have influenced his thinking on army mechanisation when he set up Chilwell in 1935 and persuaded the powers than be that all types of vehicle, including tanks, should come within its remit.