Andy Stewart, KB1OIQ, writes on the fox-hunting list at 10:53 AM on August 10, 2019:
Fox hunters: get ready!
I am headed out shortly to hide two foxes in Westford. Get your gear ready for 2m and 80m fox hunting!
I will send another email in an hour or so with a clue about the location.
Wait until 12:30 PM before fox hunting in Westford. The highly encrypted clue uses the ROT1 decrpytion algorithm.