I found these illustrations of Beau Brummell on Wikipedia. It is interesting to note that for a man of such sartorial elegance, that there are very few historical drawings, paintings or sketches that you can find on the internet. Brummell is credited as being the 'grandfather' of the modern suit and tie and is considered the apex of men's sartorial elegance. The word 'dandy' is synonymous with Brummell, and he is referred to consistently in modern culture, such as in Billy Joel's 'It's Still Rock N Roll' lyrics.
'How about a pair of pink sidewinders
And a bright orange pair of pants?
You could really be a Beau Brummell baby
If you just give it half a chance.'