Clark Street Bridge
Day shift inventory
The poem opens with industrial Chicago—wagons hauling goods, workers commuting. Clark Street Bridge was a major commercial artery in 1916.
Night shift census
The lonely cop walks his beat while cabaret dancers head to work in Chicago's entertainment district. Different labor, same bridge.
Singing three times
He repeats 'singing' and 'voices' obsessively in the final stanza—the sound matters more than what's being said. Listen to the rhythm.