In less than ten minutes Vance reappeared, dressed for the street.

Bien, mon vieux,” he announced gaily, as Currie handed him his hat and gloves and a malacca cane. “Allons-y!

We rode up-town along Madison Avenue, turned into Central Park, and came out by the West 72d Street entrance. Margaret Odell’s apartment was at 184 West 71st Street, near Broadway; and as we drew up to the curb, it was necessary for the patrolman on duty to make a passage for us through the crowd that had already gathered as a result of the arrival of the police.

Feathergill, an assistant District Attorney, was waiting in the main hall for his Chief’s arrival.

“It’s too bad, sir,” he lamented. “A rotten show all round. And just at this time! . . .” He shrugged his shoulders discouragingly.

“It may collapse quickly,” said Markham, shaking the other’s hand. “How are things going? Sergeant Heath phoned me right after you called, and said that, at first glance, the case looked a bit stubborn.”

“Stubborn?” repeated Feathergill lugubriously. “It’s downright impervious. Heath is spinning round like a turbine. He was called off the Boyle case, by the way, to devote his talents to this new shocker. Inspector Moran arrived ten minutes ago, and gave him the official imprimatur.”

“Well, Heath’s a good man,” declared Markham. “We’ll work it out. . . . Which is the apartment?”

Feathergill led the way to a door at the rear of the main hall.

“Here you are, sir,” he announced. “I’ll be running along now. I need sleep. Good luck!” And he was gone.