“Give it to Roberts,” he said.

The big collie turned and set off at a hand-gallop.

“Good!” approved the guest.  “Bruce didn’t seem to be in any doubt as to what you wanted him to do.  He knows where Roberts is likely to be?”

“No,” said the Master.  “But he can track him and find him, if Roberts is anywhere within a mile or so from here.  That was one of the first things we taught him—­to carry messages.  All we do is to slip the paper into his collar-ring and tell him the name of the person to take it to.  Naturally, he knows us all by name.  So it is easy enough for him to do it.  We look on the trick as tremendously clever.  But that’s because we love Bruce.  Almost any dog can be taught to do it, I suppose.  We—­”

“You’re mistaken!” corrected the guest.  “Almost any dog can’t be taught to.  Some dogs can, of course; but they are the exception.  I ought to know, for I’ve been where dog-couriers are a decidedly important feature of trench-warfare.  I stopped at one of the dog-training schools in England, too, on my way back from Picardy, and watched the teaching of the dogs that are sent to France and Flanders.  Not one in ten can be trained to carry messages; and not one in thirty can be counted on to do it reliably.  You ought to be proud of Bruce.”

“We are,” replied the Mistress.  “He is one of the family.  We think everything of him.  He was such a stupid and awkward puppy, too!  Then, in just a few months, he shaped up, as he is now.  And his brain woke.”

Bruce interrupted the talk by reappearing on the veranda.  The folded envelope was still in the ring on his collar.  The guest glanced furtively at the Master, expecting some sign of chagrin at the collie’s failure.

Instead, the Master took the envelope, unfolded it and glanced at a word or two that had been written beneath his own scrawl; then he made another penciled addition to the envelope’s writing, stuck the twisted paper back into the ring and said—­

“Roberts.”

Off trotted Bruce on his second trip.

“I had forgotten to say which train you’ll have to take in the morning,” explained the Master.  “So Roberts wrote, asking what time he was to have the car at the door after breakfast.  It was careless of me.”

The guest did not answer.  But when Bruce presently returned,—­ this time with no paper in his collar-ring,—­the officer passed his hand appraisingly through the dog’s heavy coat and looked keenly down into his dark eyes.

“Gun-shy?” asked the guest.  “Or perhaps he’s never heard a gun fired?”

“He’s heard hundreds of guns fired,” said the Master.  “I never allow a gun to be fired on The Place, of course, because we’ve made it a bird refuge.  But Bruce went with us in the car to the testing of the Lewis machineguns, up at Haskell.  They made a most ungodly racket.  But somehow it didn’t seem to bother the Big Dog at all.”