Version used by Ildhafn musicians is on page 66 of the Big Lochac Snogbook. Note that after bar 34 we hold for another bar, so effectively the minim D and A become four beats long. Similarly when we repeat from the start, the very last bar also becomes four beats. We customarily play a chorus to finish, after the last verse.
There is sheet music in many sources, including the Cantiones Secundae (Southron Gaard Songbook), the Big Lochac Snogbook.