The Missing Chapter

<Samuel puts down the journal and looks back up at you.> While trying to figure out where the shrines reside, I came across an entry that mentioned him exploring an area that sounds very similar to Dustwallow Marsh. He mentions hiding something of great importance there. It's a long shot, given when this earthen roamed Azeroth, but perhaps if you were to retrace his final steps you may find something. I'll mark the location on your map.