The man, warming to my mood, cranked his engine rapidly and sprang to the wheel. I was wild with excitement now, and fearful lest the cab ahead should have disappeared; but fortune seemingly was with me for once, and I was not twenty yards behind when Zarmi's cab turned the first corner ahead. Through the gloomy street, which appeared to be populated solely by streaming umbrellas, we went. I could scarcely keep my seat; every nerve in my body seemed to be dancing—twitching. Eternally I was peering ahead; and when, leaving the well-lighted West End thoroughfares, we came to the comparatively gloomy streets of the suburbs, a hundred times I thought we had lost the track. But always in the pool of light cast by some friendly lamp, I would see the quarry again speeding on before us.

At a lonely spot bordering the common the vehicle which contained
Zarmi stopped. I snatched up the speaking-tube.

"Drive on," I cried, "and pull up somewhere beyond! Not too far!"

The man obeyed, and presently I found myself standing in what was now become a steady downpour, looking back at the headlights of the other cab. I gave the driver his promised reward.

"Wait for ten minutes," I directed; "then if I have not returned, you need wait no longer."

I strode along the muddy, unpaved path, to the spot where the cab, now discharged, was being slowly backed away into the road. The figure of Zarmi, unmistakable by reason of the lithe carriage, was crossing in the direction of a path which seemingly led across the common. I followed at a discreet distance. Realizing the tremendous potentialities of this rencontre I seemed to rise to the occasion; my brain became alert and clear; every faculty was at its brightest. And I felt serenely confident of my ability to make the most of the situation.

Zarmi went on and on along the lonely path. Not another pedestrian was in sight, and the rain walled in the pair of us. Where comfort-loving humanity sought shelter from the inclement weather, we two moved out there in the storm, linked by a common enmity.

I have said that my every faculty was keen, and have spoken of my confidence in my own alertness. My condition, as a matter of fact, must have been otherwise, and this belief in my powers merely symptomatic of the fever which consumed me; for, as I was to learn, I had failed to take the first elementary precaution necessary in such case. I, who tracked another, had not counted upon being tracked myself! …

A bag or sack, reeking of some sickly perfume, was dropped silently, accurately, over my head from behind; it was drawn closely about my throat. One muffled shriek, strangely compound of fear and execration, I uttered. I was stifling, choking … I staggered—and fell….

CHAPTER XVII