'She sought him east, she sought him west, She sought him braid and narrow; Syne in the cleaving o' a craig She found him drowned in Yarrow.' But best-remembered of the Yarrow Cycle is _The Dowie Dens_. One cannot analyse the subtle aroma of this flower of Yarrow ballads. In it the song of the river has been wedded to its story 'like perfect music unto noble words.' It is indeed the voice of Yarrow, chiding, imploring, lamenting; a voice 'most musical, most melancholy.' A ballad minstrel with a master-touch upon the chords of passion and pathos, with a feeling for dramatic intensity of effect that Nature herself must have taught him, must have left us these wondrous pictures of the quarrel, hot and sudden; of the challenge, fiercely given and accepted; of the appeal, so charged with wild forebodings of evil: '"O stay at hame, my noble lord, O stay at hame, my marrow! My cruel kin will you betray On the dowie howms o' Yarrow"'; of the treacherous ambuscade under Tinnis bank; of the stubborn fight, in which a single 'noble brand' holds its own against nine, until the cruel brother comes behind that comeliest knight and 'runs his body thorough'; of the yearning and waiting of the 'winsome marrow,' while fear clutches at her heart: '"Yestreen I dreamed a doleful dream, I fear there will be sorrow, I dreamed I pu'ed the birk sae green For my true love on Yarrow. O gentle wind that blaweth south Frae where my love repaireth, Blaw me a kiss frae his dear mouth And tell me how he fareth"'; lastly, of the quest 'the bonnie forest thorough,' until on the trampled den by Deucharswire, near Whitehope farmhouse, she finds the 'ten slain men,' and among them 'the fairest rose was ever cropped on Yarrow': 'She kissed his cheek, she kaimed his hair, She searched his wounds a' thorough, She kissed them till her lips grew red On the dowie howms o' Yarrow.' The story is said to be founded on the slaughter of Walter Scott of Oakwood, of the house of Thirlstane, by John Scott of Tushielaw, with whose sister Grizel the murdered man had, in 1616, contracted an irregular marriage, to the offence of her kin. On this showing, it is of the later crop of the ballads. But it is well-nigh impossible to think of rueful Yarrow flowing through her dens to any other measure than that which keeps repeating 'By strength of sorrow The unconquerable strength of love.'