This French engraving (I've cropped this from the whole image) is of a 1858 regatta on the Seine at Saint-Cloud. It is the oldest pictorial rendering I've come across of a full-on racing Sandbagger. This is the fleet of the larger racing sailboats (they split the fleet around a 5.66 meter length) and shows the sandbagger with a good lead.
The sandbagger was one of those successful invasive species. Recreational sailboat racing got going in France on the rivers surrounding Paris and the over-canvassed, unballasted foreign import thrived in the river conditions. The French called the type, "clipper" and eventually modified the design for even faster light air speed.
Here is a profile drawing of an 1887 clipper.
This image of the engraving was found by French historian, Louis Pillon, who published a book last year on the early history of yachting in France,
La Voile dans les boucles de La Marne
(TOH to Tom Price who was the first to spot the image on the Net.)
Bald but my eyebrows are growing at a prolific rate. Sailed Windmills and Y-Flyers in the 1960's. Founded Miami University (OH) sailing team. Sailed International 14's and Lasers in the 1970's. Sailed International Canoes in the 1980's to mid 1990's. Sailed Classic Moths since 2002. Enjoy boatbuilding though I'm very, very slow at it (the Internet doesn't help matters). Name in real life: Rod Mincher
After choosing this username (Tweezer is the name of my Classic Moth), further research on the Internet turned up that Tweezerman is a corporate name for a line of pedicure products. Let me emphasize that I do not work for, nor endorse these products.