"He's turning south on Fenchurch," Houston said a little later. "I wonder where he's going."
"Keep after him," said Headquarters. "Our net men haven't spotted either of you yet. They can hardly see across the street in this damned fog."
Houston kept going.
"What the hell?" he whispered a few minutes later. "He's still following Fenchurch Street! He's doubling back!"
Leadenhall Street, the banking center of the City of London, runs almost due east-and-west; Fenchurch Street makes a forty-five degree angle with it at the western end, running southwest for a bit and then curving toward the west, toward Lombard.
"Houston," said HQ, "touch your left ear."
Houston obediently reached up and scratched his left ear.
"Okay," said HQ. "Bogart's spotted you, but he hasn't spotted Sir Lewis. Bogart's across the street."
"He can't miss Sir Lewis," whispered Houston. "Conservatively dressed—matching coat and trousers of orange nylon tweed—royal blue half-brim bowler—carrying a blue brief case."
There was a pause, then: "Yeah. Bogart's spotted him, and so has MacGruder. Mac's on your side, a few yards ahead."