Paying Respects achievement in Red Dead Redemption 2

Interactive map was perfect, led me right to every location. Beware though, some of the tombstone icons are for murder puzzle clues which are NOT related to this achievement, be sure to click on each and see what the text says, I wasted a lot of time riding to a couple murder clues with my noob ass no stamina horse I got at the start of the epilogue, NOT FUN.

And to answer the question about whether this has to be done with Arthur,