-<a href="/images/bigclock.png"><img src="/images/bigclock.png" height="100" alt="an image of the big clock filling a screen"></a>
-<a href="/images/bigclock-recording.png"><img src="/images/bigclock-recording.png" height="100" alt="an image of the big clock while recording"></a>
+<figure>
+ <a href="/images/bigclock.png"><img src="/images/bigclock.png" height="100" alt="The big clock filling a screen"></a>
+ <a href="/images/bigclock-recording.png"><img src="/images/bigclock-recording.png" height="100" alt="The big clock while recording"></a>
+ <figcaption>
+ The Big Clock, with no transport rolling (left) and recording (right).
+ </figcaption>
+</figure>