Part of a series of caches exploring this beautiful area of Buckinghamshire. Collect the matched letter and number printed in this series to locate the bonus cache. You are looking for a film canister.
Another one to leave you stumped!
Congrats to Team_VP_for being FTF and to nottheactor for the close 2nd!
Fghzc gb gur evtug, bss gur cngu fyvtugyl, ol n cvyr bs zbffl ybtf.