"Yes, sir—but you must remember I wasn't countin' the minutes, so to speak. Maybe it was only three—maybe it was ten. Anyhow, it was just nine-thirty when she left. I remember looking at the clock when she went out."

From the watchman's house, located well over in the northeastern section of the city, Taylor made his way to Madelaine James's apartment on Connecticut Avenue, discovering that young lady on the point of setting off to keep a luncheon engagement.

"I won't keep you a minute, Madelaine," promised the Secret Service operative. "Just want to ask what you know about Mrs. Mahlon Prentice?"

"Wife of the Third Assistant Secretary of State?"

Taylor nodded.

"She's a Chicago woman, I believe. Came here a couple of years ago when her husband received his appointment. Rather good-looking and very popular. I happened to be at a dinner with her last evening and—"

"You what?"

"I was at a dinner at the Westovers' last night," repeated the James girl, "and Mrs. Prentice was among those present. Looked stunning, too. What's the trouble?"

"What time was the dinner?" Taylor countered.

"Eight o'clock, but of course it didn't start until nearly eight-thirty."