Library Mystery?

Leiber mystery?

This index card was created many years after the index card system was abandoned at the local library. My experience, the subject matter of the newly discovered manuscript by Fritz Leiber and this card is far beyond coincidence.

All it took was one look and I knew the cards and the book were for me and I was on time with the program.

Will somebody from the library tell me why there was a few thousand of these around?

Contemporary traces