Hastings' Dictionary of the Bible (1898)
JE'ARIM, MOUNT (mount of forests), a place named in noting the northern boundary of Judah. Josh 15:10. The boundary ran from Mount Seir to "the shoulder of Mount Jearim, which is Chesnlon" — that is, Chesalon was the landmark on the mountain. Keslu stands 7 miles due west of Jerusalem, on a high point on the north slope of a lofty ridge, which is probably Mount Jearim. Considerable woods still exist there.