My other discovery today was this [
http://skaldic.arts.usyd.edu.au/db.php?table=doc&id=331 ]. Some notes
by Kari Ellen Grade on the 'ljóðaháttr' metre, for the editors of the
Skaldic Poetry of the Scandinavian Middle Ages project. In
particular, I was interested to learn that most types of Old Norse
verse, unlike Old English, don't allow 'resolution' in the second lift
-- but that this is permitted in 'ljóðaháttr', e.g. 'brestanda boga',
'sá er yfir ölðrom þrumir', where the short initial syllable of 'boga'
and 'þrumir' counts together with the following syllable as metrically
equivalent to one land syllable.

LN