"From whom did these instructions come?"
"That is one of the minor points which I have already cleared up," he replied. "On my way here I called at the house agent's, as you know, since I have the keys; I also called at the station. The sergeant who was on duty last night I could not see, unfortunately, but I learned—that it was a woman who rang up."
My heart sank lower and lower. It seemed to me as we stood in that empty garage that an invisible hand was drawing a net closer and closer about Isobel and my ideas became increasingly chaotic, for the purpose of it all eluded me, try how I would to conceive of a scheme by which any one could profit which necessitated the imprisonment, or worse, of Isobel.
"And the agent?" I asked in a rather toneless voice.
Gatton shook his head.
"I have no reason to doubt the word of this man of business," he replied, "because at the time when I saw him he could not possibly have learned of the crime, but nevertheless his account is almost unbelievable. It appears then, he, too, received his instructions throughout by telephone."
"What?" I exclaimed.
"By telephone," repeated Gatton. "He was rung up about ten days ago by some one who made a verbal offer to lease the Red House for a period of twelve months. A foreigner, who in lieu of the usual references, was prepared to pay the annual rent in advance. As the Red House, to use an Irishism, was regarded as something of a white elephant, the agent was interested, apparently; and when on the following day the sum agreed upon arrived by post, he did not demur about delivering the keys to the prospective lessee, who desired to take certain measurements in regard to carpets and so forth."
"Wait a moment," I interrupted; "to whom did he deliver these keys?"
"To a district messenger who called for them, as the agent had been advised that one would do."