The uniquely enduring literary agent who worked for years to find a publisher for Jack Kerouac’s “On the Road” and over the following decades arranged deals for everyone from true crime writer Joe McGinniss to the creators of the Berenstain Bears has died.

The discovery of more than a dozen boxes of records at Mar-a-Lago has alarmed historians and archivists, who rely on government documents to eventually provide a more complete picture of every presidential administration.