Under the lights the entire set sparkled with a tawdry garishness apt to fool those uninitiated into the secrets of photography. On the screen, colors which now seemed dull and flat would take on a soft richness and a delicacy characteristic of the society in which Kauf's characters were supposed to move. Obviously fragile scenery would seem as heavy and substantial as the walls and beams of the finest old mansion. Even the inferior materials in the gowns of most of the girls would photograph as well as the most expensive silk; in fact, by long experience, many of the extra girls had learned to counterfeit the latest fashions at a cost ridiculous by comparison.

Kennedy approached Kauf, then returned to us.

"He asks us to wait until he gets this one big scene. It's the climax of the picture, really, the unmasking of the 'Black Terror.' If we interrupt now he loses the result of half a day of preparation."

"He may lose more than that!" muttered Mackay; and I wondered just whom the district attorney suspected.

"Is everyone here?" I asked. "All seven?"

Gordon and Shirley, of the men, and Marilyn and Enid, of course, were out on the floor of the supposed ballroom. Gordon I recognized because I remembered that he was to wear the garb of a monk. Marilyn was easily picked out, although the vivacity she assumed seemed unnatural now that we knew her as well as we did. Her costume was a glorious Yama Yama creation, of a faint yellow which would photograph dazzling white, revealing trim stockinged ankles and slender bare arms, framing face and eyes dancing with merriment and maliciousness. Unquestionably she was the prettiest girl beneath the arcs, never to be suspected as the woman who had braved the terrors of a film fire to rescue the man she loved. Enid was stately and serene in the gown of Marie Antoinette. In the bright glare her features took on a round innocence and she was as successful in portraying sweetness as Marilyn was in the simulation of the mocking evil of the vampire.

Shirley interested me the most, however. I wondered if Kennedy still eliminated him in guessing at the identity of the criminal. I called to mind the heavy man's presence in the basement at the time of the explosion and McGroarty's information that he had been hanging about that part of the studio for some time previously. Some one had planted a cigarette case and stub to implicate Gordon, according to Kennedy's theory. Shirley certainly had had opportunity to steal the towel from the locker as well as to point suspicion toward the leading man.

In the midst of my reverie Shirley approached and passed us. He was in the garb of Mephisto. Like the others, he had not yet masked his face. A peculiar brightness in his eyes struck me and I nudged Kennedy.

"Belladonna," Kennedy explained when he was beyond earshot.

"Oh!" I remembered. "Enid told him to use it."