Washington University in St. Louis, named for the first American president, announced this President’s Day, the discovery of a tie to another president.

The university recently learned that its libraries have a collection of books originally owned by Thomas Jefferson.

The 28 titles, including 74 volumes, were donated to Washington University in 1880, with no mention of their provenance.

This year marks the 150th anniversary of the Civil War.

And just in time comes historian Adam Arenson’s new book “The Great Heart of the Republic: St. Louis and the Cultural Civil War.”

While Arenson is a professor at the University of Texas El Paso, he spent a year in St. Louis doing research for his book.