After discovering a talent for forgery during the Civil War, James Reavis headed west and started one of the most ambitious hoaxes of all time. He invented a Spanish nobleman named Miguel de Peralta, devised his entire family tree, and began assiduously forging documents claiming 10 million acres of prime Arizona land for the don’s descendants. Then he traveled throughout Spain and Mexico, carefully seeding libraries and archives with the forged deeds, mortgages, and wills.

When all was ready, he went before the U.S. surveyor general in 1881 and showed that rights to these lands now belonged to him. He imposed taxes on residents throughout Arizona, including the Southern Pacific Railroad and the Silver King Mine, but when their lawyers sought to challenge the claims they found Reavis’ carefully forged documents on file.

The ruse made Reavis one of the richest land barons in Arizona, and soon he’d bought mansions in New York, Washington, St. Louis, and Mexico. But it all lasted less than 10 years, unraveling in 1890 when a Spanish linguist detected the forgeries. Reavis served six years in prison and spent the rest of his life on the streets of Santa Fe.