WHERE IS JENNY AND MAC'S GRAVE SITE?

I took a long stroll into Grizzles and I went to where I thought I would find Jenny or Mac's grave, so I went down to Sadie's ranch. I found a medical box in her now burnt-down house. That's when I had the thought of searching for their gravesite. I thought I heard Hosea and Dutch talk about sending someone to bury them at Sadie's ranch. I'm not too sure as my memories get very foggy.