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76 have been the deuce to pay. No, this is the place for me. Hullo, here's another knock."

This visitor proved to be of an entirely different type to the last. Tommy recognized in him an Irish Sinn Feiner. Certainly Mr. Brown's organization was a far-reaching concern. The common criminal, the well-bred Irish gentleman, the pale Russian, and the efficient German master of the ceremonies! Truly a strange and sinister gathering! Who was this man who held in his finger these curiously variegated links of an unknown chain?

In this case, the procedure was exactly the same. The signal knock, the demand for a number, and the reply "Correct."

Two knocks followed in quick succession on the door below. The first man was quite unknown to Tommy, who put him down as a city clerk. A quiet, intelligent-looking man, rather shabbily dressed. The second was of the working classes, and his face was vaguely familiar to the young man.

Three minutes later came another, a man of commanding appearance, exquisitely dressed, and evidently well born. His face, again, was not unknown to the watcher, though he could not for the moment put a name to it.

After his arrival there was a long wait. In fact Tommy concluded that the gathering was now complete, and was just cautiously creeping out from his hiding-place, when another knock sent him scuttling back to cover.

This last-comer came up the stairs so quietly that he