It’s going to depend on the CSS of your theme. If you have .alignleft set to float: left; the images should appear next to each other from left to right. It helps to post a link so people can see what is going on.
My page can be found here:
http://www.elliottlock.co.uk/blog/gameography
I would like the green (number) image to be aligned at the top of the box art (shogun) image.
Well, I can tell you that a class="ALIGN=TOP" will not work.
I’m also not sure that <address> is valid HTML.
Your first image is not assigned to .alignnone .alignleft .aligncenter or .alignright (no markup for alignment at all).
Your second image is assigned to .alignnone.
HTH
Wrap the images in a table similar to this..the results are shown here…(view source code).
Tables are not necessary. There is a lot of wonky code on that site.
There are surely many ways to do this, the technique I have linked you to is rather simple and easy to setup.