"I watched you go on board the barge, and I noticed her edging out into the river, and it was easy enough to know that none of you had cast her off, because what you said showed that you were even more surprised than I was.

So, sez I to meself, 'Arthur, me boy, barges don't untie themselves from wharves in that casual sort of way, and at just the right minute, too, for anyone who wanted to dispose of a cop,' begging your pardon, Mr.Policeman, but that was the line of argument I had with meself." "Try the accelerator, Arthur," groaned Devar.
"If ever I meet with a bit of an accident, sir, I always pull up and plan the wheel-marks; I carry a tape for the purpose, and it saves a lot of hard swearing in court afterwards." Brodie spoke seriously, and Devar vowed that he would interrupt no more, since he merely succeeded in stimulating the man's torpid wits.
Even now, the chauffeur waited to allow his philosophy to sink into minds which might prove unreceptive.

Finding that there was no likelihood of debate, he went on: "It struck me, too, that a feller who didn't hesitate about shoving a good car into a river must be a rank tough, the kind of character who would jump at the chance of plugging me with a bullet, or two, for that matter, and hiking off with the car, without anybody being the wiser, so I nipped out from behind the wheel, and, taking care to keep away from the light, crept in behind that pile of rock there," and he nodded to the mass of dressed stone which filled one end of the wharf.
He waited, as though to make sure that they appreciated his generalship.

Devar's teeth grated, and McCulloch stirred uneasily, but no one spoke.
"You'll notice that it is only a few feet away," he said, measuring the distance with a thoughtful eye, "but, to make sure of reaching anybody who might try to monkey with the car, I groped around until I had found two half bricks.

Then I waited.