We broke into a gay and happy step, suggestive of twin hearts utterly free from care.

"Why do you look so thoughtful?" asked the girl in blue after ten minutes of it.

"I've just heard some good news," I said.

"Oh, do tell me!"

"I don't know if it would really interest you."

"I'm sure it would."

"Well, several miles from here there may be a tram, if one can find it, which goes nobody quite knows where up till one-thirty in the morning probably. It is now," I added, looking at my watch (I was getting quite good at this), "just on one o'clock and raining hard. All is well."

The dance over, I searched in vain for my hostess. Every minute I took out my watch and seemed to feel that another tram was just starting off to some unknown destination. At last I could bear it no longer and, deciding to write a letter of explanation on the morrow, I dashed off.

My instructions from Miss White with regard to the habitat of trams (thrown in by her at the last moment in case the train failed me) were vague. Five minutes' walk convinced me that I had completely lost any good that they might ever have been to me. Instinct and common sense were the only guides left. I must settle down to some heavy detective work.

The steady rain had washed out any footprints that might have been of assistance, and I was unable to follow up the slot of a tram conductor of which I had discovered traces in Two-hundred-and-fifty-first Street. In Three-thousand-eight-hundred-and-ninety-seventh Street I lay with my ear to the ground and listened intently, for I seemed to hear the ting-ting of the electric car, but nothing came of it; and in Four-millionth Street I made a new resolution. I decided to give up looking for trams and to search instead for London—the London that I knew.