"What letter d'you mean ?" "Well, there's a letter--it'll be in this museum some day--which came just before that last double event.

'Twas signed 'The Avenger,' in just the same printed characters as on that bit of paper he always leaves behind him.

Mind you, it don't follow that it actually was The Avenger what sent that letter here, but it looks uncommonly like it, and I know that the Boss attaches quite a lot of importance to it." "And where was it posted ?" asked Bunting.

"That might be a bit of a clue, you know." "Oh, no," said the other.

"They always goes a very long way to post anything--criminals do.