From Ancient and modern Scottish songs, heroic ballads, etc. by George Paton (Edinburgh: John Wotherspoon, 1776), page 11:

APRON DEARY

'Twas early in the morning, a morning of May,
A soldier and a lassie was wauking astray;
Close down in yon meadow, yon meadow brow,
I heard the lass cry, my apron now,

My apron, deary, my apron now,
My belly bears up my apron now,
But I being a young thing, was easy to woo,
Which maks me cry out, My apron now.

O had I ta'en counsel o' father or mother,
Or had I advised wi' sister or brother,
But I being a young thing, and easy to woo,
It makes me cry out, My apron now,

My apron, deary, &c.

Your apron, deary, I must confess,
Seems something the shorter, tho' naething the less;
Then had your tongue, deary, and I will prove true,
And nae mair cry out, Your apron now.

Your apron, deary, &c.—Your belly, &c.
Then had your tongue, &c.