My Brother's Bar connection to the Beat Generation

• He owed $3-$4 (about $52 in 2023).

Why it matters: The letter showcases My Brother's connection to the Beat Generation, a literary movement that grew prominent in the 1950s, and included Cassady and writers like Allen Ginsberg and Jack Kerouac.

• Cassady, who grew up in Denver, is often cited as a major influence on Ginsberg and Kerouac, who based the character Dean Moriarty in his famous novel "On the Road" on Cassady.

What they're saying: "Neal Cassady is arguably one of the biggest literary pop culture figures, one of the most influential, from Denver — maybe of anybody," Brian Trembath, a librarian at the Denver Public Library, told the Colorado Sun in 2019.

Of note: The city's tourism office offers a Beat Generation tour showing places alluded to in writings from Beatniks, including Sonny Lawson Park in Five Points and Civic Center Park.