It is interesting that some on this thread consider our country's first line of intelligence defense, the super computers and those who analyze codes and ciphers in different languages of the NSA inadequate to "solve" the C1 & C3 Beale codes from an 1885 adventure treasure dime novel.
In the last 130 years NO conclusive evidence has ever been found or presented that can prove anything in the Beale Papers text narrative ever occurred.
If the Beale expedition and the other events related in the 1885 job pamphlet never happened, then the DOI "solved" C2 was provided as a lure for the unwary reader to buy into the story ad play along, while C1 & C3 contain no real message, as many professional codebreakers in the intelligence field have maintained.
To discount the efforts of the NSA supercomputers and analysts because their determination concerning the Beale ciphers doesn't match one's preconceived version, is pure hubris on their part.