There's a lot of landmines out there and one of them seems to be these seemingly period watercolors that have been springing up on eBay and other auction houses for the last few years. Their subject matter is generally of fairly significant events or historical figures (Civil War, negro soldiers, etc...) of the 19th century and are typically framed in period frames and backed with pages from 19th century books. Once you've seen a few of them, stylistically they stand out like a sore thumb. The unfortunate part is that quite a few collectors have dropped hundreds, if not thousands of dollars on them. Some can be quite convincing. I even did a post of one a while back! But if you see one, just buy it for it's decorative value because there's little else besides it.