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
Bell-Irving River and the headwaters of the Unuk River, which flows southwest to the sea near Ketchikan, Alaska, and the Bear River, which flows south to the head of Portland Canal at the community of Stewart, British Columbia. From its source the Bell-Irving River flows generally south through mostly mountainous terrain. It is joined by Craven Creek, then Rochester Creek. The Yukon Telegraph Trail follows Rochester Creek and part of the Bell-Irving River. The Yukon Telegraph line, also called the Dominion Telegraph, grew out of part of the earlier, failed Russian–American Telegraph, and connected Ashcroft, BC, to Dawson City, Yukon. The telegraph