I had fidgeted in my cab for perhaps half an hour when I became aware that mine was not the only cab that was waiting in the neighborhood. In these shadowing jobs one has to keep his eyes glued on the door through which the “subject” must exit, for it is unbelievable how easily a person, even when not aware of being watched, may slip out into a crowd and disappear. Consequently I had not paid much attention to my surroundings.

But once when I leaned forward to speak to my driver, who by this time was fully convinced that I was crazy, I happened to glance across the street. At the window of another cab I saw a familiar face. Sanchez had lost Paquita at the station, but by some process of reason had picked her up again at the tea-room. I was determined more than ever now to hang on to both of them.

Luncheon over, Paquita finally emerged, still alone. What business she may have transacted over the telephone during her various stops I do not know. What I wanted was for her to feel perfectly free, in the hope that she might do something. Yet she had not given me the satisfaction of meeting a single person whom she should not have met.

Again her cab started on its round, but this time it rolled back into the theater district.

My driver almost jolted me from the seat as he stopped once. I looked ahead. Paquita’s cab had pulled up before the office of a well-known music publisher and she was getting out.

To my surprise, however, instead of entering she deliberately turned and walked back in the direction of my cab. I sank farther back into its shallow recesses, trusting that she would not glance my way.

A dainty creation of headgear intruded itself through the open window of my cab.

“You have been following me all day, Mr. Jameson,” purred Paquita in her sweetest tone, as her baffling brown eyes searched my face and enjoyed the discomfiture I could not hide. “I know it—have known it all the time. There’s another cab, too, back of you. I’ve been going about my own business—haven’t I?—making arrangements for my new show this fall. You haven’t anything—except a bill, have you? Neither has the man in the other cab. Now I’m going to go right on. You are welcome to follow.”

Before I could reply she had swept disdainfully back and had entered the building. Chagrined though I was at the way she had led the chase, I determined to stick to her, nevertheless.

In the publishing house she remained an uncommonly long time, but when at last she came out I saw that she gave a little petulant glance first to see whether I was still there.