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.
I've seen the lily of the wold;
I've seen the opening marigold,
Their fairest hues at morn unfold;
But fairer is my Mary.
How sweet the fringe of mountain burn,
With op'ning flowers at spring's return!
How sweet the scent of flowery thorn!
But sweeter is my Mary.
Her heart is gentle, warm, and kind;
Her form's not fairer than her mind;
Two sister beauties rarely join'd,
But join'd in lovely Mary.
As music from the distant steep,
As starlight on the silent deep,
So are my passions lull'd asleep
By love for bonnie Mary.