Five minutes later the girl came out, the old housekeeper accompanying her to the door, the car emerged from the lane, Zara el-Khala entered it and was driven away. I could see no one seated beside the chauffeur. I started my "Indian" and leapt in pursuit.
As I had anticipated, the route was Eastward, and I found myself traversing familiar ground. From the south-west to the east of London whirled the big car of mystery—and I was ever close behind it. Sometimes, in the crowded streets, I lost sight of my quarry for a time, but always I caught up again, and at last I found myself whirling along Commercial Road and not fifty yards behind the car.
Just by the canal bridge a drunken sailor lurched out in front of my wheel, and only by twisting perilously right into a turning called, I believe, Salmon Lane, did I avoid running him down.
Sacre nom! how I cursed him! The lane was too narrow for me to turn and I was compelled to dismount and to wheel my "Indian" back to the highroad. The yellow car had vanished, of course, but I took it for granted that it had followed the main road. At a dangerous speed, pursued by execrations from the sailor and all his friends, I set off east once more turning to the right down West India Dock Road.
Arriving at the dock, and seeing nothing ahead of me but desolation and ships' masts, I knew that that inebriated pig had spoiled everything! I could have sat down upon the dirty pavement and wept, so mortified was I! For if Zara el-Khala had secured the envelope I had missed my only chance.
However, pardieu! I have said that despair is not permitted by the Bureau. I rode home to my hotel, deep in reflection. Whether the girl had the envelope or not, at least she had escaped detection by the doctor; therefore if she had failed she would try again. I could sleep in peace until the morrow.
Of the following day, which I spent as I had spent the preceding one, I have nothing to record. At about the same time in the evening the yellow car again rolled into view, and on this occasion I devoted all my attention to the dark-skinned chauffeur, upon whom I directed my glasses.
As the girl alighted and spoke to him for a moment, he raised the goggles which habitually he wore and I saw his face. A theory which I had formed on the previous night proved correct. The chauffeur was the Hindu, Chunda Lal! As Zara el-Khala walked up the steps he backed the car into the narrow lane and I watched him constantly. Yet, watch as closely as I might, I could not see where he concealed himself in order to command a view of the road.
On this occasion, as I know, Dr. Stuart was at home. Nevertheless, the girl stayed for close upon half an hour, and I began to wonder if some new move had been planned. Suddenly the door opened and she came out.
I crept through the bushes to my bicycle and wheeled it on to the drive. I saw the car start; but Madame Fortune being in playful mood, my own engine refused to start at all, and when ten minutes later I at last aroused a spark of life in the torpid machine I knew that pursuit would be futile.