I figured you were just making an example, but wanted to make sure.
As far as the link I have seen them done this way many times. That's how I do them. And I'm not aware of a reason to put a span around them - that's why I was asking. You never know what Feature will be added to these readers...
I would just use:
<p> ..... country quiet, of his mother,<a class="fn" id="F2" href="Endmatter.html#N2"></a> of poetry – ....</p>