Here is the version that Jeannie Carpenter and I sang, in the mid to late 1960s. I had this from the singing of Ray and Archie Fisher.

I must away now, I can no longer tarry.
The morning tempest I have to cross :
I must be guided without a stumble
Unto the arms I love the most.

And whe he's come to his true love's dwelling -
He's knelt down gently upon a stone.
And through the window he's whispered slowly :
'Is my true lover within at home ?'

She's raised her head from off her down-white pillow.
She's raised the blanket from off her breast -
And through the window she's whispered slowly
'Who's that disturbing me at my night's rest ?'

'Wake up, wake up, love - it is your own true lover.
Wake up, wake up, love and let me in.
For I am wet, love, and also weary -
For I am wet, love, unto my skin.'

She's raised her up then, with the grandest pleasure.
She's raised her up and she's let him in.
And they lay locked in each others' arms
Until that long night was past and gone.

And whn that long night was past and over.
And whn the smoke clouds began to form -
He's taken her hand, aye - they've kissed and parted.
He's saddled and mounted and away did roam.

Hope this helps.