Accounting Error
Oh right, sorry Brogg, I forgot that Accounting NWP. Well, it was a code disguised as accounting, so you probably were all like "What?! These numbers just don't add up! Something funny is going on here!" And then Marivhon was like "Well, if you look at the frequency distribution of the numbers, and bootstrap to correct for the small sample size, it matches the frequency distribution of characters in natural language, so I'm guessing it's probably some sort of elementary substituition cypher. Certain patterns, such as single symbols and double symbols, can only be such-and-such characters, so we can start to narrow down the possible coding scheme etc"
Now that we got that taken care of, okay, you guys tie up Caruthers and Sons, head out, grab Dave, and head to the Warehouse District of Greyhelm, down by Lake Greyhelm. You find warehouse 713. There's a big-ass rusty padlock. Command, squires?