Southmost Haedir
This haedir to the west of your entry point is also the easiest to reach. It reveals 3 ithildin, 2 memories, 2 artifacts, and, of course, the barrow.
Northwest Haedir
This haeldir has one artifact in common with the southernmost haeldir, leaving another 2 artifacts, 1 Shelob Memory, and one ithildin.
Northeast Haedir
The only point of interest this has in common with the other two is the barrow, leaving 2 ithildin and 4 lost artifacts.