@jws So here we go, nested Markdown links!
First, a clickable image with full-sized version opening in new tab/window:
[![Fishlegs](http://bazbt3.github.io/images/fishlegs.png)](http://bazbt3.github.io/images/fishlegs.png)
Second, an image in theory with clickable link to the blog post:
[![Fishlegs](http://bazbt3.github.io/images/fishlegs.png)](http://bazbt3.10centuries.org/2014/02/02/a-sense-of-humour)
This'd better work. :}