Hidden on: 07/18/2018

Title: The World According to Humphrey

Author: Betty G. Birney

Tracking Number: 5016

Location: Sanborn Tennis Courts, Port Huron, MI United States

Clue:

CFIJOE B XBMM PG CMVF, JT UIF BOTXFS UP UIJT DMVF
See the picture for a hint to decode the cipher.