In 1874 he graduated from the Pennsylvania Military College, and four years later, after studying law at Columbia University, was admitted to the bar.

The marriage took place in New York City in order to avoid what a newspaper called "notoriety due to the shooting last year in San Francisco."

The couple initially divided their time between Washington and California but settled permanently at Decatur House following Beale's decision in 1912 to sell Tejon Ranch to a syndicate of investors headed by Harry Chandler and Moses Sherman.

Truxtun Beale spent his last years assembling his father's papers for an official biography and writing about foreign affairs.

He died at his country home near Annapolis, Maryland and is buried in Bruton Parish Churchyard, Williamsburg, Virginia.