The Deptford Trilogy (published 1970 to 1975) is a series of inter-related novels by Canadian novelist Robertson Davies.
The trilogy consists of Fifth Business (1970), The Manticore (1972), and World of Wonders (1975). The series revolves around a precipitating event: a young boy throws a snowball at another, hitting a pregnant woman instead, who goes into premature labor. It explores the longterm effects of these events on numerous characters.
The Deptford trilogy has won praise for its narrative voice and its characterizations. The main characters originate from the same small village. Each carries a secret that crosses the lives of the others and drives the plot forward. Fifth Business is considered one of Davies' best novels. The second novel, The Manticore, won the Governor-General's Literary Award in the English language fiction category in 1972.
The trilogy was named for its setting in the fictional village of Deptford, Ontario. This is based in part on Davies' native Thamesville. Davies takes the view of different characters in each novel, and expresses each in a different style. The tone and unconventional literary devices of metafiction have led some later critics to suggest the series was a precursor to what has been called "slipstream" fiction in the 21st century.
Fifth Business is narrated by Dunstable (later Dunstan) Ramsay, who grows up in Deptford, a fictional town in southwestern Ontario, Canada. After World War I, he becomes a teacher and serves for decades at a college. The epistolary novel takes the form of a letter Ramsay writes to the headmaster of Colborne College after his retirement. He feels ill used by an article about him in the school paper. He recalls how, as a boy, he ducked a snowball intended for him. It hit a pregnant woman instead, and she gave birth prematurely. This incident and related events deeply affected Ramsay's life. He tells how he came to terms with his guilt. He also tells of his boyhood friend and enemy, Percy Boyd "Boy" Staunton, who becomes a wealthy businessman and politician.