Was there a link between that circumstance and the long delay which Lanyard had suffered in the telephone booth? Had the Knickerbocker operator been less stupid and negligent than she seemed? Was the truth of the matter that Crane had surmised Lanyard would attempt communication with the Brooke girl and had set a watch on the switchboard for the call?

Assuming that the Secret Service man had been clever enough for that, it was not difficult to understand that Lanyard had purposely been kept dangling at the other end of the wire till the call could be traced back to its source and a messenger despatched from the nearest Western Union office with instructions to follow the man who left the booth, and report his name and local habitation.

Sharp work, if these inferences were reasonable. And, satisfied that they were, Lanyard inclined to accord increased respect to the detective abilities of the American.

But this note, this hurried, unsigned scrawl of five unintelligible words: what the deuce did it mean?

On the evidence of the handwriting a woman had penned it. Cecelia Brooke? Who else? Crane might well have been taken into her confidence, subsequent to the sinking of the Assyrian, and on discovering that Lanyard had survived have used this means of relieving the girl's distress of mind.

But its significance?… "Au Printemps" translated literally meant "in the springtime," and "in the springtime at one o'clock" was mere gibberish, incomprehensible. There is in Paris a department store calling itself "Au Printemps"; but surely no one was suggesting to Lanyard in New York a rendezvous in Paris!

Nevertheless that "Please!" intrigued with a note at once pleading and imperative which decided Lanyard to answer it without delay, in person.

"Au Printemps—one o'clock—please!"

Upon the screen of memory there flashed a blurred vision of an electric sign emblazoning the phrase, "Au Printemps," against the façade of a building with windows all blind and dark save those of the street level, which glowed pink with light filtered through silken hangings; a building which Lanyard had already passed thrice that night without, in the preoccupation of his purpose, paying it any heed; a building on Broadway somewhere above Columbus Circle, if he were not mistaken.

Already it was one o'clock. Fortunately he was still in evening dress, and needed only to change collar and tie to repair the disarray caused by his encounter with Ekstrom.