I purchased a coloured drawing a few years ago and recently found more information about it from the Fine Arts Museum of San Francesco at the link:

http://search.famsf.org/4d.acgi$Record?2801&=list&=1&=&=And&=13519&=0&=keywords&=Yes&=&=&=19%20&=Yes&=&=f

The drawing is by Thomas Rowlandson entitled "More Scotchmen, or Johnny MacCree, opening his new budget, 1807"
and appears to be an almost exact copy of the one in the link above. It certainly looks like it is nearly 200 years old, although the condition is only average. Would mine be another original or a copy? Does anyone have any idea of the value?

Thanks

Tim