“Where are the supports?” asked the Scottish officers. “In God’s name, where are the troops who were to follow on? Why did we do all this bloody fighting to be hung up in the air like this?”

The answer to their question has not been given in any official despatch. It is answered by the tragedy of the 21st and 24th Divisions, who will never forget the misery of that day, though not many are now alive who suffered it. Their part of the battle I will tell later.