quainted with Tobias's literary taste, and to learn why he should have selected the police for his beneficiaries."
"But, my dear Vance, what possible connection?"
"Desist! You can't think of a question I have not already put to myself; and I'm unable to answer any of them. But the fact remains, I must inspect that library even if you have to get a judicial order to batter down the door. There are sinister undercurrents in that old house, Markham; and a hint or two may be found in that secret room."
"It will be a difficult proceeding if Mrs. Greene stands firm on her refusal to deliver the key to us." Markham, I could see, had already acquiesced. He was in a mood to accede to any suggestion that even remotely promised a clarification of the problem posed by the Greene murders.
It was nearly three o'clock when we reached the house. Heath had already arrived, in answer to a telephone call from Markham; and we at once presented ourselves to Mrs. Greene. Following an ocular sign from the Sergeant the new nurse left the room; and Markham went directly to the point. The old lady had eyed us suspiciously as we came in, and now sat rigidly against her pile of pillows, her gaze fixed on Markham with defensive animosity.
"Madam," he began, somewhat severely, "we regret the necessity of this call. But certain things have arisen which make it imperative that we visit Mr. Greene's library. . . ."
"You sha'n't!" she broke in, her voice rising in an infuriated crescendo. "You sha'n't put your foot in
