This week's Featured Web site is suggested by John and Nancy Wilson, who write:
While looking for a watermark on an old advertising note we just purchased, we came across this site which has its history. As you know in our numismatic hobby lots of watermarks will be found on notes, checks or other documents that we have in our collections. An interesting site with useful information.
One page of the site of particular interest to numismatists is titled "Counterfeiters And Sir William Congreve's Triple Paper Colored Watermarks". Many thanks for suggesting this site!