"I should have to see it nearer to answer that question with any sort of confidence," he demurred. "From such glimpses as I can get of it from here I should say that it has not been taken from any of our exhibits."
"I am sure it has not," muttered Correy. Then with a side glance at Mr. Gryce, he added: "Shall I slip in behind and get it?"
The detective, thus appealed to, hesitated a moment; then with an irrelevance perhaps natural to the occasion, he inquired where this door so conveniently hidden from the general view led to. It was the Curator who answered.
"To a twisting, breakneck staircase opening directly into my office. But this door has not been used in years. See! Here is the key to it on my own ring. There is no other. I lost the mate to it myself not long after my installation here."
The detective, working his way back around the pedestal, cast another glance up and down the gallery and over into the court. Still no spying eye, save that of the officer opposite.
"We will leave that bow where it is for the present," he decided, "a secret between us three." And motioning for Correy to let the tapestry fall, he stood watching it settle into place, till it hung quite straight again, with its one edge close to the wall and the other sweeping the floor. Had its weight been great enough to push the bow back again into its former place close against the door? Yes. No eye, however trained, would, from any bulge in the heavy tapestry, detect its presence there. He could leave the spot without fear; their secret would remain theirs until such time as they chose to disclose it.
As the three walked back the way they had come, the Curator glanced earnestly at the detective, who seemed to have fallen into a kind of anxious dream. Would it do to interrupt him with questions? Would he obtain a straight answer if he did? The old man moved heavily but the now fully alert Curator could not fail to see that it was with the heaviness of absorbed thought. Dare he disturb that thought? They had both reached the broad corridor separating the two galleries at the western end before he ventured to remark:
"This discovery alters matters, does it not? May I ask what you propose to do now? Anything in which we can help you?"