“My union, Tuppence, my union! It does not permit me to work before 11 a.m.”

“Tommy, do you want something thrown at you? It is absolutely essential that we should without delay map out a plan of campaign.”

“Hear, hear!”

“Well, let’s do it.”

Tommy laid his paper finally aside. “There’s something of the simplicity of the truly great mind about you, Tuppence. Fire ahead. I’m listening.”

“To begin with,” said Tuppence, “what have we to go upon?”

“Absolutely nothing,” said Tommy cheerily.

“Wrong!” Tuppence wagged an energetic finger. “We have two distinct clues.”

“What are they?”

“First clue, we know one of the gang.”