The Esk and Liddel being favourite fishing streams, Langholm is the headquarters of the association which protects the rights of anglers.
It is separated from England by the Solway Firth, the Sark, Scotsdyke (an old embankment in 55°3' N., connecting the Sark with the Esk), the Esk (for one mile), the Liddel, the Kershope, the Cheviot Hills, the Tweed and a small area known as the " liberties " of Berwick.
The short land-frontier of England with Scotland (its length is only loo m.) is in great measure a physical boundary, as considerable lengths of it are formed on the east side by the river Tweed, and on the west by Kershope Burn, Liddel Water, and the river Sark; while for the rest it follows pretty closely the summit of the Cheviot Hills, whose highest point is the Cheviot (2676 ft.).
Constitutes the boundary, which is thereafter formed by a series of streams - Bells Burn, the Kershope, Liddel and Esk.
At the extreme west between the Sark and Esk as far up the latter as its junction with the Liddel, there was a strip of country, a "No man's land," for generations the haunt of outlaws and brigands.
On the English side the region is watered by the Till, Bowmont, Coquet, Rede and North Tyne; on the Scottish by the Tweed, Whiteadder, Leet, Kale, Jed, Kershope, Liddel, Esk and Sark.