Fòram na Gàidhlig

In Ossian's Hall of Mirrors is the following quatrain and I can't exactly say I understand it all:

Faic ann a d' àrainn an sgeul
air chùl sgàile na sgeòil -
cluinn briathrachd na h-aibhne cabraich
's i 'g aithris a beuc de sgeòil

I came up with

See there the habitat of the story
at the back of the story's shadow (reflection?)
hear the verbosity of the antlering (=branching?) river
as she relates her bellowing story

The first two lines in particular make hardly any sense to me, and the a d' in the first is a complete mystery. Anybody got an explanation, or, more probably, correction?

Maybe "See the story in your habitat behind the story's shadow"?

Mòran taing, a Luchaig - yes, like that it would make sense. I knew I needed somebody more poetic than me to have a look at it!