It grew still heavier when Durbin, joining us, added his incredulity to the air of suspicion assumed by the others. Through all the explanations I now entered into, I found myself inwardly repeating with somewhat forced iteration, "I will not believe her guilty under any circumstances. She carries the look of innocence, and innocent she must be proved, whatever the result may be to Francis Jeffrey."
To such an extent had I been influenced by the lofty expression which I had once surprised on her face.
Had Mr. David Moore been sitting open-eyed behind his vines that morning, he would have been much surprised to see so many of his natural enemies intrude on his property at so early an hour. But, happily, he had not yet risen, and we were able to enter upon our investigations without being watched or interrupted by him.
Our first move was to go in a body to the southwest chamber, take down the picture, examine it with a magnifying-glass and satisfy ourselves that the words I had picked out of its mazy lines were really to be found there. This done and my veracity established, we next proceeded to the closet where, according to the instructions embodied in this picture, the secret spring was to be found by which some unknown and devilish machinery would be released in the library below.
To my great satisfaction the active part in this experiment was delegated to me. Durbin continued to be a mere looker-on. Drawing out the two large drawers from their place at the end of this closet, I set them aside. Then I hunted for and found the small loophole which we had been told afforded a glimpse of the library hearthstone; but seeing nothing through it, I called for a light to be placed in the room below.
I heard Durbin go down, then the major, and finally, the district attorney. Nothing could stay their curiosity now, not even the possibility of danger, which as yet was a lurking and mysterious one.
But when a light shot up from below, and the irregular opening before me became a loophole through which I could catch a very wide glimpse of the library beneath, I found that it was not necessary for me to warn them to keep away from the hearth, as they were all clustered very near the door - a precaution not altogether uncalled for at so hazardous a moment.
"Are you ready?" I called down.
"Ready!" rose in simultaneous response from below.
"Then look out!"
Reaching for the spring cleverly concealed in the wall at my right I vigorously pressed it.
The result was instantaneous. Silently, but with unerring certainty, something small, round, and deadly, fell plumb from the library ceiling to where the settle had formerly stood against the hearthstone. Finding nothing there but vacancy to expend itself upon, it swung about for a moment on what looked like a wire or a whip-cord, then slowly came to rest within a foot or so from the floor.
A cry from the horrified officials below was what first brought me to myself. Withdrawing from my narrow quarters I hastened down to them and added one more white face to the three I found congregated in the doorway. In the diabolical ingenuity we had seen displayed, crime had reached its acme and the cup of human depravity seemed full. When we had regained in some measure our self-possession, we all advanced for a closer look at the murderous object dangling before us. We found it to be a heavy leaden weight painted on its lower end to match the bosses of stucco-work which appeared at regular intervals in the ornamentation of the ceiling. When drawn up into place, that is, when occupying the hole from which it now hung suspended, the portion left to protrude would evidently bear so small a proportion to its real bulk as to justify any eye in believing it to be the mate, and the harmless mate, of all the others.
"It hangs just where the settle stood," observed Durbin, significantly.
