Then came the crowning surprise of all.

This person was none other than the stylish and supposed-to-be aristocratic Kennington Glanworth!

Glanworth knew the men, and he spoke to them. He sat down beside them, and Frank edged a little nearer.

Then the listening boy heard Glanworth soundly berating the bomb-thrower. The young man had been drinking, and he was very angry.

Glanworth seemed to be furious because the bomb had been thrown into the rooms occupied by Mr. Burrage and Inza.

“You ought to be hanged, Linton, for that little piece of business!” he snarled, glaring at the bomb-thrower.

Linton protested that he had not the least idea who occupied the rooms, and declared that his only object had been to “dispose of the boy.”

“You are a bungler at best,” growled Glanworth; “and you should not be intrusted with such jobs.”

Then Durant warned them to lower their voices, and Frank could not understand what followed.

But the boy had heard quite enough, and he wondered if he could find policemen near at hand and bring them down on the three villains.