about to leap from my seat with an offer of assistance when the insistent pressure of de Grandin's finger on mine held me back. Turning toward him, I saw his head nod sharply toward the doorway behind the girl, and following his silent bidding, I cast my glance into the passageway in time to see someone slip quickly and noiselessly down the hall.
For a moment I sat in wondering silence, debating whether I had seen one of the servants creep past or whether I was the victim of an optical illusion, when my attention was suddenly compelled to a second figure, then a third, a fourth and a fifth passing the archway's opening like flashes of light against a darkened wall. My reason told me my eyes were playing pranks, for the gliding, soundless figures filing in quick procession past the proscenium of the dining-room door were tall, bearded men encased in gleaming black steel, armed cap-à-pie, and shrouded from shoulder to spurs in voluminous sable cloaks.
I blinked my eyes and shook my head in bewilderment, wondering if I had fallen into a momentary doze and dreamed the vision, but sharply, with theatrical suddenness, there sounded the raucous, brazen bray of a bugle, the skirling squeal of an unoiled windlass reeling out rope, the thud of a drawbridge falling into place; then, above the whistling November wind there winded another trumpet flourish and the clatter of iron-shod hooves against stone paving-blocks.
"Why, what was that?" Miss Prettybridge forgot the spirit message still being thumped out on the table and threw back her head in momentary alarm.
"Sounds like a troop of scouts out for an evening's lark," put in our host, rising from the table. "Queer they should come out here to toot their bugles, though."
"Ha, parbleu, you say rightly, my friend," de Grandin broke in, rising so suddenly that his chair tilted back and fell to the floor with a resounding crash. "It is queer, most damnably queer. 'Boy Scouts' did you say? Prie Dieu they be not scouts of evil in search of some hapless little lad while a company of empty-headed fools sit idly by listening to the chatter of their decoy!
"Did none of you recognize the message the spirit had for me?"
We looked at him in silent astonishment as he lighted the wall-candles one after another and faced us with a countenance gone livid with fury.
"Ah bah, it is scarcely worth troubling to tell you," he cried, "but the important message the spirit had for me was a silly little nursery rime:
"Great A, little a,
Bouncing B.
The cat's in the cupboard,
And can't see me!
"No, mordieu, the cats might not see that accursed decoy spirit, but Jules de Grandin could see the others as they slunk past the door upon their devil's work! Trowbridge, mon vieux, look to Mademoiselle O'Shane, if you will."
Startled by his command, I turned round. Dunroe O'Shane had fallen forward across the table, her long, tawny hair freed from its restraining pins and lying about her head like a pool of liquid bronze. Her eyes were still closed, but the peaceful, longing expression had gone from her face, and in its stead was a look of unutterable fear and loathing.
"Take her up, some of you," de Grandin almost shrieked. "Bear her to her chamber and Dr. Trowbridge and I will attend to her. Then, Monsieur Van Riper, if you will be so good, I shall ask you to lend us one of your swiftest motor cars."
"A motor car—now?" Van Riper's incredulous tone showed he doubted his ears.
"Précisément, Monsieur, permit that I compliment you on the excel-
