Rochester, Kent the Blackheath Beds of sand and gravel. As a human settlement, Rochester became established as the lowest river crossing of the River Medway, well before the arrival of the Romans. It is a focal point between two routes, being part of the main route connecting London with the Continent and the north-south routes following the course of the Medway connecting Maidstone and the Weald of Kent with the Thames and the North Sea. The Thames Marshes were an important source of salt. Rochester's roads follow north Kent's valleys and ridges of steep-sided chalk bournes. There are four ways out of
Black River (Chehalis River) Black River (Chehalis River) The Black River is a river in Thurston County in the U.S. state of Washington. It is approximately long with a drainage basin of about . The Black River's source is Black Lake, located about west of Tumwater. The river flows generally south, through the Mima Mounds State Natural Area, then southwest, passing by Rochester and entering Grays Harbor County, then emptying into the Chehalis River in the Chehalis Indian Reservation. The fur trader John Work was the first to describe the Black River in 1824: "The Black River so named from the colour of its