The Puzzle Map

Expect this post to get bigger and bigger as it will be updated when the party finds more pieces to the map.

Hint: The symbols each represent a number, you do not have the key, but could start developing one.

A map with four rooms mapped out already

"Phosphorus, Hydrogen, Sulfuric"

"A key requires no sight."

"The future will be the undoing of the past."

"Sound lures the beast."