John Sampas, Kerouac’s brother-in-law and literary executor, oversaw this transaction. Some of the items include letters from author Neal Cassady and beat poet Allen Ginsberg, personal photographs, and an old passport.
Here’s more from The New York Times: “The material, which has not been processed, contains a typescript for the play “Beat Generation,” which Kerouac wrote after the success of On the Road in 1957. (It went unproduced, and largely forgotten, though parts were integrated into the 1959 film Pull My Daisy.) It also contains manuscripts and correspondence dating from the 1940s to the 1960s, including a letter in which Kerouac teased Ginsberg about his promiscuous epistolary habits.”