I've asked around some gaelic speaking friends and we've come up wiht the following for the 3 verses that are usually cited - thought I'd post this just in case anyone else is interested. It may not be entirely accurate, but it's interesting to compare this slightly more literal take with Lachlan MacBean's translation,and helps you make sure you smile ot frown at the right lines!

O fair young Mary, you're the maid of my dreams,
My life wish is to be with you.
Now I have claimed you, as I have yearned,
Our marriage sealed by the clergy,
With solemn oaths and strong bonds,
With a knot that will last and not perish,
And winning your hand, with our friends' goodwill,
Fills me with lasting joy.

I went to the woodlands where the trees
Made a scene of beauty all around.
I looked with longing at the loveliest flower
That grew on the high branches.
The stem bearing this bud far above the ground,
I gently drew down,
No other could attain this blossom
It was I who was fated to harvest the bough.

If I now find your steadfast solace
Gives me comfort and safe haven,
Though I should come to linger on alone
I would not desire another wife after you,
I will never bring strife to our home,
Like an arrow to your breast
But most harmoniously with love I'll greet you,
As warmly as my lips are able.