Yarrow, a famous Scottish stream which rises on the confines of the shires of Peebles, Dumfries, and Selkirk, passes NE. through the Loch of the Lowes and St. Mary's Loch, and joins the Ettrick 2 m. above Selkirk after a course of 25 m.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Yarrell, William * Yates, Edmund