Cache is not a listed location. You will need to solve the puzzle to get the coords. Cache is a medium sized rubbermaid container with trade items and log book. Please use stealth. Hide better than before.
Dr. Jekyll received an invite to the Monster Mash Bash. However, he needs to make a new batch of his elixir to prevent him from transforming into Mr. Hyde. He needs the following ingredients:
Tc Sr I B
Bi S Be Hg
The ingredients hold the key to the location you seek. First four ingredients are for North coordinates. Last four ingredients are for West coordinates.