When at Half Price Books on Friday, the girls each picked up a book and I came across a box of 10 postcards. Not just any cards, but 9½ x 3¾-inch color glossy shots depicting New York City. The printing’s high quality, though the image selections are standard: the skyline from various vantages, the Empire State Building, Times Square, the Brooklyn Bridge, and of course the Statue of Liberty.

“Of course” because the set was originally sold by the Statue of Liberty Gift Center. The box says so. All in all, not best cards I’ve ever bought, but certainly worth the modest price that Half Price Books wanted. I didn’t open the box until I got home. Until last night, in fact.

Then I discovered that the cards were a lot more interesting than I thought. Four out of the 10 cards were already addressed and stamped, with messages written. One was addressed and stamped, but with no message. Five were blank. What a find.

For some reason, the person who (presumably) bought the cards at the Statue of Liberty took the trouble to compose the messages and prepare to mail the cards — and then didn’t, either through forgetfulness, or a change of heart, wanting to keep them after all. That was at least 10 years ago. The writer didn’t date any of them, but cards like this demand first-class postage, and she put 37¢ stamps on them. That was the rate from June 2002 to January 2006.

The signature name is a woman’s name, but the writing implies a young woman, maybe even a teenager. She seems to have been visiting a relative in New York — there’s mention of a cousin — and she also relates on more than one card that, “I went up to our room, and the bed broke! It was really funny…” Besides that, she saw the Statue of Liberty, a beach somewhere, and Boston.

Four of the cards are addressed to a western suburb of Chicago, one to Pennsylvania. In the fullness of time, I plan to add the necessary 12¢ to each card, and send them from neither metro Chicago nor New York. Even if none of the people on cards are  there any more — and it’s entirely likely that some are — someone will get each card. It will add another layer to the mystery of why there were never sent, and why, if kept as souvenirs, they were at Half Price Books.