Enigma, the official publication of the National Puzzlers’ League, published this item in the “Chat” column of its August 1916 issue:

“The police department of Lima, O., is greatly puzzled over a cryptic message received in connection with the robbery of a Western Ohio ticket agent. Here it is: WAS NVKVAFT BY AAKAT TXPXSCK UPBK TXPHN OHAY YBTX CPT MXHG WAE SXFP ZAV FZ ACK THERE FIRST TXLK WEEK WAYZA WITH THX.”

As far as I can tell, in the ensuing 97 years it has never been solved. Any ideas?