He looks kindly down [Kage] The simplest incantation to make small text is to put <small> and </small> around the text you want to disembiggen. Tuj, Software and I have gone a step or two beyond the basics, however.
A good limerick follows some rules, My line is not a perfect example though. Good hints may be found here: http://freespace.virgin.net/merrick.sheldon/limerickrules.htm