Cubitt is a hood in Pinkie's gang. He is a wise-cracking thug, constantly needling Pinkie for his youth and his resistance to drink and women. As such, there is much antipathy between two. This reaches a head after Pinkie - wanting to scare Cubitt into cooperation - tells him that he killed Spicer. Cubitt is horrified, and he flees to Colleoni to try to get a job. When he is turned down, he turns to Ida, who gives him money for information on Pinkie's gang. The last time the reader sees Cubitt, he drunkenly interrupts Pinkie's wedding night and demands money. He presumably leaves town soon thereafter.