Alston fades out of American records in the 1790s. On January 22, 1793, he sold goods to his son-in-law, John Gilbert in Logan County, Kentucky. He was recorded in county records on October 22, 1799, to prove another deed involving Gilbert. One account notes that Alston and his son, Peter conducted their counterfeiting operation at Stack Island, in the lower Mississippi River valley about 170 miles upriver from Natchez. This would have been around 1799, at the same time that river pirates were operating from there under the leadership of Samuel Mason, who had been at Cave-in-Rock.