What is letter from m rdr2?

The letter from M in RDR2 is a mysterious letter that the player character Arthur Morgan receives from an unknown person named M. It is believed that M is Micah Bell, a notorious outlaw who is one of Arthur's closest associates in the Van Der Linde gang.

The content of the letter is unclear, but it is suggested that it contains information about the whereabouts of some hidden treasure or secret meeting place. The letter also appears to have some sort of threat or warning to Arthur, as M mentions that he is watching him closely and advises him to be careful.

Overall, the letter from M is a significant plot point that adds an element of intrigue and danger to the storyline of RDR2. It also foreshadows the betrayal of the Van Der Linde gang by Micah Bell, who turns out to be working with the law enforcement officials and other enemies of the gang.