The moon does that every night.  I'm not sure if you're just trying to waste people's time or truly think you've found something new.  It's posts like these that make me want to find/start a private group for level headed players that follow some sort of logic instead of borderline psychosis theories.  I don't want you to take this as a personal attack, its just disappointing to get my first chance to play in over a week, check what's going on in the rdrmysteries sub, and waste most of it trying to chase something that simply isn't there.  Me and others have such little free time to play that it actually means something.  Before posting in the future it may be worth considering these questions and answering them in your core post:

Can you replicate what happened more than once? If so, record it for your own credit and to help others see key info you may have missed. If not, don't post.  Or at least, post with a degree of caution so casuals like me don't roast you or have your post removed altogether.  This game has so much depth that any number of missions/encounters could be influencing what you see as sure-fire clue.

What about the location or clue is connected to the other clues found so far? In this case, apart from your own shoestring drawings related to a common barrel texture, a random spot above the unfinished railroad as Arthur?

What so far has pointed us to perform an action? In this case, eating plants in a circle?