"Both the persons, whom you left in Todd's shop," he said, "belong to my force; and the one only went for the protection of the other, as I, of course, surmised that you would be at once sent out of the way upon some real or mock errand, to give Todd opportunity of committing a murder. My great object is to find out precisely how he does the deed; and the man who came in to be shaved was to make what observations of the place he could during the ceremony, while the other distracted Todd's attention."
"I understand," said Johanna. "I of course knew that they were friends when they mentioned the watchword of St. Dunstan to me."
"Exactly. I gave them instructions to seize the very first opportunity of letting you hear the watch-word. Are there any large cupboards in the shop?"
"Yes. There is one of great size."
"Would it, do you think, hold two men?"
"Oh, yes. Perchance you, who are tall, might have to stoop a little; but with that exception as to height, there is most ample space."
"That will do then. I cannot tell you, of course, the exact hour; but be it when it may, the moment Todd leaves the shop to day to go upon any business out of doors, two persons from me will come to hide themselves in that cupboard."
"They will use the watch-word?"
"Yes, certainly; and you will so dispose any movable article in the shop, as to take away any idea that the cupboard had been visited, or in the slightest degree interfered with."
"That I can easily do."