watch any confederate. I had no intention to quibble over side-issues. As I started northward, indeed, after that mysterious figure in the Gainsborough hat and the cream-colored gown, a most pleasurable and purposeful tingle of excitement thrilled up and down my backbone.

I shadowed her as guardedly as I was able, following her block by block as she hurried up the empty thoroughfare that was now as quiet and lonely as a glacial moraine. My one fear was that she would reach the Waldorf, or some equally complex beehive of human life, before I could overtake her. Once there, I knew, she would be as completely lost as a needle in a haystack.

She may have suspected me by this time, I felt, for twice I saw her look back over her shoulder.

Then I suddenly stopped and ducked into a doorway. For a moment after I saw a taxicab come clattering into the avenue out of Thirty-third Street I discovered that, at her repeated gesture, it was pulling up beside the curb.

I stood well back in the shadow until she had climbed into the seat, the door had slammed shut, and the driver had turned his vehicle about and started northward again. Then I skirted along the shop fronts, darted across the street, and made straight for the hotel cabstand and a taxi driver drowsily exhaling cigarette smoke up toward the tepid midnight skies. The bill I thrust into his hand took all the sleep out of his body and ended the incense to the morning stars.

"Up the avenue," I said as I clambered in. "And follow that taxicab two blocks behind until it turns, and then run up on it and wait."

It turned at Forty-second Street and went eastward to Lexington Avenue. Then, doubling on its tracks, it swung southward again. We let it clatter on well ahead of us. But as it turned suddenly westward, at the corner of Twenty-third Street, we broke the speed laws to draw once more up to it. Then, as we