The Dunbeath Water - Neil Gunn's 'Highland River'

...all at once before him again was the tiny stream and lifting his eyes he saw the far half of the loch, Loch Braighe na h'Aibhne, the water-head.
A deep humour flooded his sight and as he stood still, and his tongue came out searching his lips. His expression was half shy as at the unexpected sight of a loved woman. Then he went on, looking at the streamlet, until presently its water grew quiet, seeming to flow neither way; and when he came to the loch he saw that its shores were not of dove-grey sand but of pure ground quartz, paler than any woman's face in any old poet's dream.

—Neil M Gunn, Highland River