1868, Imperial Gazetteer of Scotland, edited by John Marius Wilson and published by A. Fullarton and Co
Innerleithen, a parish partly in Selkirkshire, but chiefly in Peebles-shire; and containing in the latter section, a post-office village of its own name. It is bounded, on the north-east, by Edinburghshire and the Selkirkshire part of Stow; on the south, by the Tweed, which divides it from Yarrow parish in Selkirkshire and Traquair parish in Peebles-shire; and on the west, by the parishes of Peebles and Eddlestone. It has a somewhat triangular outline; and measures, along the northeast side, 11¼ miles,—along the south side, 7¼ miles,—and, along the west side, 6 miles. The Selkirkshire section is a stripe on the south-east side, ascending 5½ miles from the Tweed, with a breadth of from 7 furlongs to 2½ miles. The surface of the entire parish gradually rises from the Tweed to the northern extremity, and has, in general, a broken, rugged, and precipitous appearance. Hills, forming part of the broad range which diverges at an acute angle from the central chain of the southern Highlands at the Hartfell group, and runs northeastward to St.