They had now taken the handkerchief down from the window, and, directly they saw him, Desmond waved it, showing that they were watching him.

He threw up his arm, turned, and disappeared again.
"He has made out my message," Desmond said.

"We may expect him here at ten o'clock." While he had been watching, his two comrades had, under his instructions, been unravelling a portion of one of their blankets.
When enough thread had been obtained, the strands were tied together and doubled, and Desmond had little doubt that it was sufficiently strong to draw up the string Mike would bring with him.

He now took another portion of the bill, and pricked upon it the words: At nine tomorrow night, bring, if possible, fine steel saw, two files, and small bottle of oil.

Fasten these to string we will lower with further instructions.
He then opened his coatee, took out some of the white wool with which it was padded, formed this into a loose ball, in the centre of which the note was fastened, and all being in readiness, waited patiently, until, just as the city clock struck ten, they heard a low whistle.