Thanks for replying.
I couldn't manage without a caption, really. Each gallery's content would not be very obvious to anyone. Nor would I be able to easily display an image count. I'll show the HTML so that you can see what I referred to:
I didn't mean to imply that anyone with a disability is any less intelligent. I'm in a position to be offended by that if anyone suggested it to me. But since starting to develop my own site, usability has been high on my list of things to study, and I wouldn't want any user to struggle with something because of an omission on my part.
<div class="thumbnail" id="gallery1">
<a class="img" rel="gallery1" href="----"><img src="thumbnails/coast.jpg" alt="A pebble beach after dusk with street lights reflected in the water"></a>
<div><span class="title">Coast</span><span class="img-count">5 images</span></div> <!-- that is the caption -->
As I mentioned, the page has an H1.
What about the ARIA attributes? Any thoughts?