Can anyone enlighten please:

From Sir Maxwell MacLeod of Fuinary's 2007 post
I've a better understanding the general sentiment, many thanks.

Of the many versions, one has
"Where Ossian sang his martial lay"
Have found articles on 'Ossian', but what is the line saying ?

Also, Google insists Fiunary's location is a single house
a short drive from the village of Lochaline (itself tiny).
Where is (or was) it ?