Leaven of Malice, published in 1954, is the second novel in The Salterton Trilogy by Canadian novelist Robertson Davies.
The book starts out with a false, anonymous engagement notice between Pearl Veronica Vambrace and Solomon (Solly) Bridgetower published in the local newspaper, the Bellman.
Matters are not helped by the fact that Solly, while having once invited Pearl to a ball, is still besotted with Griselda Webster, a local beauty and heiress, who is definitely not interested in him (cf.
Along with several major and minor characters in the novel, they pursue a quest for the person responsible for entering the false wedding notice, who is dubbed 'X'.
The climactic scene takes place at the Bellman, where the principal characters gather and the identity of X is revealed.