How do we learn about the Fitzroy gangsters Snowy Cutmore and Micky Morgan

At Squizzy Taylor’s, Dolly warns Charlie that Squizzy is in a bad mood. Charlie overhears Squizzy talking to Dasher about Snowy Cutmore, who is giving Squizzy trouble by bad-mouthing him all over town. Charlie listens through the door as Squizzy admits to Dasher to having short-changed Cutmore on a jewelry job in Kew. Dasher warns Squizzy that Cutmore has been drinking with the notoriously violent Micky Morgan. Charlie comments that Cutmore is also known for his violence, and that he once used a hot iron to brand a woman who refused his advances. Teamed up with Morgan, Cutmore would be difficult to beat.