Was it strange, then, after all, that the police, seeking a clew through motive, should have been driven to frenzy on every occasion in finding themselves forever confronted with what, from every angle they were able to view it, was quite a purposeless crime!  On one point only they were right, the old dogma, the old, old cry, old as the institution of police, older than that, old since time immemorial—­CHERCHEZ La femme!  Quite right—­but also quite purposeless!  Jimmie Dale’s eyes grew wistful.  He had been “hunting for the woman in the case” himself, now, for months and years indefatigably, using every resource at his command—­quite purposelessly.

Jimmie Dale shrugged his shoulders.  Why go over all this to-night—­there were other things to do.  She had come to him again—­and this time with a matter that entailed more than ordinary difficulty, more than usual danger, that would tax his wits and his skill to the utmost, not only to succeed, but to get out of it himself with a whole skin.  Markel—­eh?  Jimmie Dale leaned back in his seat, clasped his hands behind his head—­and his eyes, half closed now, were studying Benson’s back again through the plate-glass front.

He was still sitting in that position as the car approached his residence on Riverside Drive—­but, as it came to a stop, and Benson opened the door, it was a very alert Jimmie Dale that stepped to the sidewalk.

“Benson,” he said crisply, “I am going downtown again later on, but I shall drive myself.  Bring the touring car around and leave it in front of the house.  I’ll run it into the garage when I get back—­you need not wait up.”

“Very good, sir,” said Benson.

In the hallway, Jason, the butler, who had been butler to Jimmie Dale’s father before him, took Jimmie Dale’s hat and coat.

“It’s a fine evening, Master Jim,” said the privileged old man affectionately.

Jimmie Dale took out his silver cigarette case, selected a cigarette, tapped it daintily on the cover of the case—­and accepted the match the old man hastily produced.

“Yes, Jason.” said Jimmie Dale, pleasantly facetious, “it a fine night, a glorious night, moon and stars and a balmy breeze—­quite too fine, indeed, to remain indoors.  In fact, you might lay out my gray ulster; I think I will go for a spin presently, when I have changed.”

“Yes, sir,” said Jason.  “Anything else, Master Jim?”

“No; that’s all, Jason.  Don’t sit up for me—­you may go to bed now.”

“Thank you, sir,” said the old man.

Jimmie Dale went upstairs, opened the door of his own particular den on the right of the landing, stepped inside, closed the door, switched on the light—­and Jimmie Dale’s debonair nonchalance dropped from him as a mask instantly—­and it was another Jimmie Dale—­the professional Jimmie Dale.