The sport was a new one to him. Though familiar with the technicalities from a course of novel reading, he had never before attempted to “follow” anyone, and it appeared to him at once that, in actual practice, the proceeding was fraught with difficulties. Supposing, for instance, that they should suddenly hail a taxi? In books, you simply leapt into another, promised the driver a sovereign⁠—or its modern equivalent⁠—and there you were. In actual fact, Tommy foresaw that it was extremely likely there would be no second taxi. Therefore he would have to run. What happened in actual fact to a young man who ran incessantly and persistently through the London streets? In a main road he might hope to create the illusion that he was merely running for a bus. But in these obscure aristocratic byways he could not but feel that an officious policeman might stop him to explain matters.

At this juncture in his thoughts a taxi with flag erect turned the corner of the street ahead. Tommy held his breath. Would they hail it?