This text comes from The Book of Scottish Song, edited by Alexander Whitelaw, a historical songbook transcribed on Wikisource and reproduced from the pinned revision linked below.
Blythe ha'e I been on yon hill,
As the lambs before me;
Careless ilka thought and free,
As the breeze flew o'er me:
Now nae longer sport and play
Mirth or sang can please me,
Lesley is sae fair and coy.
Care and anguish seize me.
Heavy, heavy, is the task,
Hopeless love declaring:
Trembling, I dow nocht but glow'r,
Sighing, dimnb, despairing!
If she winna ease the thraws.
In my bosom swelling;
Underneath the grass-green sod,
Soon maun be my dwelling.