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Fourths and Fifths Letterbox Hybrid

Hidden : 2/20/2026
Difficulty:
5 out of 5
Terrain:
1.5 out of 5

Size: Size:   regular (regular)

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Geocache Description:


Fourths and Fifths

Have a close look: here is important information to read before your visit! This musical letterbox hybrid gadget geocache is located at the posted coordinates, but you will need a special tool to open the container. Please review the following instructions carefully:

  • Kindly visit after the dawn but before late evening. The container is located on private property with permission from the owner (me). Visitors assume all risks associated with finding and retrieving the geocache.
     
  • Lift up the black object behind the bushes to reveal the container. Carry the container back to your car so you can work in a quiet place.
     
  • The neighbors have basic knowledge about this hide, but they cannot provide any advice. No additional hints are located on site.
     
  • Absolutely, positively, no using tools to pick the lock or pry open the lid! Do not remove the tape or attempt access through physical means! If you break these rules, I will delete your log without further warning.
     
  • Instead, the most instrumental piece of information is this: you need to play the correct musical work on your cell phone or other device! Turn up the volume and place the speaker close to the "Fourths and Fifths" label. (Earbuds are not loud enough, sorry.)
     
  • Beware the lid opening! Movement occurs without warning once the gadget recognizes the expected work (or thinks it does). If nothing happens after two minutes, try replaying from the beginning. Note that the electronics reset after a few seconds and do not transmit or retain any audio.
     
  • Again, hours are sun rise to late evening. Be sure to sign or stamp the log! Remember to leave the letterbox stamp inside. Finally, close the lid and replace the container underneath the cover.

Wishing you all good luck, and hope you enjoy! Congratulations to VBHUNTER for a well deserved FTF.

Additional Hints (Decrypt)

"Ybbx" sbe pyhrf ng gur fnzr cynpr va rnpu cnentencu.

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)