America’s first treasury secretary, Alexander Hamilton, wrote a lot of letters in his lifetime—so many that previously unknown documents penned by the founding father are still turning up more than two centuries after his death. As CNN reports, a collection of Hamilton letters owned by the same family for generations is being sold to the public for the first time.

The 10 letters appeared on the Raab Collection’s online historical documents marketplace earlier this week. They date back to Hamilton’s years as George Washington’s treasury secretary. In one letter Hamilton outlines the U.S.’s policy on international neutrality; in another he executes the country’s first public loan.

A family from New England had kept the artifacts in a private collection until now. The letters, which are being sold individually for $14,000 to $30,000, hold a total value of $150,000.

Thanks to Hamilton’s rise to super-stardom via Broadway, the artifacts have received plenty of attention. Employees at the Raab Collection are working overtime to respond to interested buyers.

[h/t CNN]