Richard Kerr is a wastrel chef in Eel Pie Holm, he and others gather at night for duck soap. A rubber duck in a boiling soup pot. Arthur Hastings asks him about it, he explains it's a decoy to lure real ducks into the soup. Sue Slaymaker argues saying ducks won't knowingly land in stew. Richard feed up throws away the duck, stating "we're never going to agree".
After doing this, him and the others realise that their own personal obsessions with the duck was tearing them apart.