(Tuesday, November 30; noon)

Markham had considerable difficulty in persuading Ada to accompany us. The girl seemed almost in a panic of fright. Moreover, she held herself indirectly responsible for Rex’s death. But at last she permitted us to lead her down to the car.

Heath had already telephoned to the Homicide Bureau, and his arrangements for the investigation were complete when we started up Centre Street. At Police Headquarters Snitkin and another Central Office man named Burke were waiting for us, and crowded into the tonneau of Markham’s car. We made excellent time to the Greene mansion, arriving there in less than twenty minutes.

A plain-clothes man lounged against the iron railing at the end of the street a few yards beyond the gate of the Greene grounds, and at a sign from Heath came forward at once.

“What about it, Santos?” the Sergeant demanded gruffly. “Who’s been in and out of here this morning?”

“What’s the big idea?” the man retorted indignantly. “That old bimbo of a butler came out about nine and returned in less than half an hour with a package. Said he’d been to Third Avenue to get some dog-biscuits. The family sawbones drove up at quarter past ten—that’s his car across the street.” He pointed to Von Blon’s Daimler, which was parked diagonally opposite. “He’s still inside.—Then, about ten minutes after the doc arrived, this young lady”—he indicated Ada—“came out and walked toward Avenue A, where she hopped a taxi. And that’s every man, woman, or child that’s passed in or out of these gates since I relieved Cameron at eight o’clock this morning.”

“And Cameron’s report?”

“Nobody all night.”

“Well, some one got in some way,” growled Heath. “Run along the west wall there and tell Donnelly to come here pronto.”

Santos disappeared through the gate, and a moment later we could see him hurrying through the side yard toward the garage. In a few minutes Donnelly—the man set to watch the postern gate—came hurrying up.