CHEVIOT HILLS, a range forming about 35 m. of the border between England and Scotland. The boundary generally follows the line of greatest elevation, but as the slope is more gradual southward than northward the larger part of the range is in Northumberland, England, and the lesser in Roxburghshire, Scotland. The axis runs from north-east to south-west, with a northward tendency at the eastern end, where the ridge culminates in the Cheviot, 2,676 ft. Its chief elevations from this point south westward fall abruptly to 2,034 ft. in Windygate hill, and then more gradually to about 1,60o ft. above the pass, followed by a high road from Redesdale. Beyond this are Carter Fell (1,815 ft.) and Peel Fell (1,964 ft.), after which two lines of lesser elevation branch westward and southward to enclose Liddesdale. The rocks include Silurian, Old Red Sandstone (with lavas) and Carbonifer ous strata, and the hills are finely grouped, of conical and high arched forms, and generally grass-covered. Their flanks are scored with deep narrow glens in every direction, carrying the headwaters of the Till, Coquet and North Tyne on the south, and tributaries of the Tweed on the north. The range is famous for a valuable breed of sheep. It was the scene of many episodes of border warfare, and its name is associated with the ballad of Chevy Chase. The main route into Scotland from England lies along the low coastal belt east of the Till ; the Till itself pro vided another, and Redesdale a third. There are numerous ruins of castles and "peel towers" or forts on the English side in this district.