While Blondy was covering the space between the house and the locust tree a green car hove in view behind him, which I presently recognised from the irreproachable chauffeur and footman as the coupé de ville. It overtook the walking figure, and came on up the road, past the wood, and past us. I wondered if our man was now inside.

Blondy reached the tree at last. I suspected that he welcomed the shade. It seemed perfectly natural for him to sit down under it. He remained there ten minutes. Several cars passed to and fro and one of them stopped. This puzzled me for a moment, but I supposed that it was merely some good Samaritan who offered the perspiring boy a lift. While Blondy was sitting there the green car went back. I was pretty sure now that it contained our quarry.

At last Blondy got up and started back. These periods of waiting try a man's nerves. Mine were pretty well on edge by this time. It seemed to take an age for the boy to retrace his steps over the visible part of the road. About two hundred yards beyond the farmhouse there was a bend in it which concealed the rest from my view.

A minute or two after Blondy disappeared from my sight, the big green car again hove into view around the bend. My heart hit up a few extra beats.

"Get ready," I sent word along the line.

To my great disappointment it did not stop at the tree. It came on, and passed the wood again with the loud purr of new tires. However, I explained it to myself by the fact that there was another car in view at the moment. I set myself to wait in the expectation of his return.

In five minutes return he did, but this time there was a car close behind, and once more he passed out of sight without stopping. I hoped that Lanman had marked the passing and repassing of the fashionable car.

It was now past two o'clock, and the hottest part of the day was coming on. A haze of heat undulated shimmeringly over the plain. Our tempers suffered. There in the little wood we were in the shade, it is true, but there was not a breath of air stirring, and the mosquitoes were busily plying their trade. The men breathed hard, and wiped their faces. At first they had taken their coats off, but finding the insects could bite through their shirtsleeves they had put them on again. I had thrown off my hot wig. A disguise was unnecessary now.

Once more the green car turned into sight beyond the farmhouse. This time the road was empty and my heart beat hopefully. Sure enough it stopped opposite the locust tree.

"Start your engines," I whispered along the line.