Red Dead Redemption II Legendary Gunslingers Billy Midnight
Billy is a bit harder to find but to start you'll need to go further south to the train station at Rhodes. Go in to the ticketing gate and the gentleman there will tell you to check the next train's bar car. So board the next train and head through it until you find the carriage with a bar in it. Billy Midnight will take off down the cart after you talk to him, so head after him. You'll need to climb onto the roof of the train to catch him. Once you've caught up to him another quickdraw gun fight will take place, defeat him and again take his picture and his weapon.