"Yes," answered Diggory, after a moment's thought, "I suppose it is.
I wish we could do something more before it's broken up."
As he spoke, he passed his hand mechanically along the lower surface of the window ledge; then with a sudden exclamation he went down on his knees, and picked something out of the wall.
It was another note written in cipher!
The missive was certainly very brief, consisting of only seven letters:—
"GLMRTSG."
"Hullo!" said Jack Vance; "they're at it again!"
His companion made no reply, but taking out a pencil, copied the cipher on the back of an envelope, and then replaced the mysterious document in the crack between the window-frame and the bricks.
"What are you doing that for?"
"Why, because they may miss it, and smell a rat. Come on; let's get the key and see what it means."
In this instance the translation of the cryptograph did not occupy much time; Diggory produced his double alphabet, and soon spelt out the word:—