He had just taken down Xenophon's Anabasis when he saw the girl walk in the door.
Let it be said forthwith that old books were not the only item on Herbert Quidley's penchant-list. He liked old wood, too, and old paintings, not to mention old wine and old whiskey. But most of all he liked young girls. He especially liked them when they looked the way Helen of Troy must have looked when Paris took one gander at her and started building his ladder. This one was tall, with hyacinth hair and liquid blue eyes, and she had a Grecian symmetry of shape that would have made Paris' eyes pop had he been around to take notice. Paris wasn't, but Quidley's eyes, did the job.
After coming in the door, the girl deposited a book on the librarian's desk and headed for the literature section. Quickly Quidley lowered his eyes to the Anabasis and henceforth followed her progress out of their corners. When she came to the O's she paused, took down a book and glanced through it. Then she replaced it and moved on to the P's ... the Q's ... the R's. Barely three feet from him she paused again and took down Taine's History of English Literature.
He simply could not believe it. The odds against two persons taking an interest in so esoteric a volume on a single night in a single library were ten thousand to one. And yet there was no gainsaying that the volume was in the girl's hands, and that she was riffling through it with the air of a seasoned browser.
Presently she returned the book to the shelf, selected another—seemingly at random—and took it over to the librarian's desk. She waited statuesquely while the librarian processed it, then tucked it under her arm and whisked out the door into the misty April night. As soon as she disappeared, Quidley stepped over to the T's and took Taine down once more. Just as he had suspected. The makeshift bookmark was gone.
He remembered how the asdf-;lkj exercise had given way to several lines of gibberish and then reappeared again. A camouflaged message? Or was it merely what it appeared to be on the surface—the efforts of an impatient typing student to type before his time?
He returned Taine to the shelf. After learning from the librarian that the girl's name was Kay Smith, he went out and got in his hardtop. The name rang a bell. Halfway home he realized why. The typing exercise had contained the word "Cai", and if you pronounced it with hard c, you got "Kai"—or "Kay". Obviously, then, the exercise had been a message, and had been deliberately inserted in a book no average person would dream of borrowing.
By whom—her boy friend?
Quidley winced. He was allergic to the term. Not that he ever let the presence of a boy friend deter him when he set out to conquer, but because the term itself brought to mind the word "fiance," and the word "fiance" brought to mind still another word, one which repelled him violently. I.e., "marriage". Just the same, he decided to keep Taine's History under observation for a while.