I advised him to have a drink, for that talk frightened me.  It looked as if he were becoming what the Scots call ‘fey’.  Lefroy noticed the same thing and was always speaking about it.  He was as brave as a bull himself, and with very much the same kind of courage; but Wake’s gallantry perturbed him.  ‘I can’t make the chap out,’ he told me.  ’He behaves as if his mind was too full of better things to give a damn for Boche guns.  He doesn’t take foolish risks—­I don’t mean that, but he behaves as if risks didn’t signify.  It’s positively eerie to see him making notes with a steady hand when shells are dropping like hailstones and we’re all thinking every minute’s our last.  You’ve got to be careful with him, sir.  He’s a long sight too valuable for us to spare.’

Lefroy was right about that, for I don’t know what I should have done without him.  The worst part of our job was to keep touch with our flanks, and that was what I used Wake for.  He covered country like a moss-trooper, sometimes on a rusty bicycle, oftener on foot, and you couldn’t tire him.  I wonder what other divisions thought of the grimy private who was our chief means of communication.  He knew nothing of military affairs before, but he got the hang of this rough-and-tumble fighting as if he had been born for it.  He never fired a shot; he carried no arms; the only weapons he used were his brains.  And they were the best conceivable.  I never met a staff officer who was so quick at getting a point or at sizing up a situation.  He had put his back into the business, and first-class talent is not common anywhere.  One day a G. S. O. from a neighbouring division came to see me.

‘Where on earth did you pick up that man Wake?’ he asked.

‘He’s a conscientious objector and a non-combatant,’ I said.

’Then I wish to Heaven we had a few more conscientious objectors in this show.  He’s the only fellow who seems to know anything about this blessed battle.  My general’s sending you a chit about him.’

‘No need,’ I said, laughing.  ’I know his value.  He’s an old friend of mine.’

I used Wake as my link with Corps Headquarters, and especially with Blenkiron.  For about the sixth day of the show I was beginning to get rather desperate.  This kind of thing couldn’t go on for ever.  We were miles back now, behind the old line of ’17, and, as we rested one flank on the river, the immediate situation was a little easier.  But I had lost a lot of men, and those that were left were blind with fatigue.  The big bulges of the enemy to north and south had added to the length of the total front, and I found I had to fan out my thin ranks.  The Boche was still pressing on, though his impetus was slacker.  If he knew how little there was to stop him in my section he might make a push which would carry him to Amiens.  Only the magnificent work of our airmen had prevented him getting that knowledge, but we couldn’t keep the secrecy up for ever.