Sir John Magill's Last Journey

Sir John Magill’s Last Journey is a 1930 detective novel by the Irish writer Freeman Wills Crofts. It is the sixth in his series of novels featuring Inspector French, a prominent figure of the Golden Age of Detective Fiction. Much of the novel takes place in Northern Ireland, particularly around Belfast, where Crofts had spent a great deal of his younger years before moving to England. As with many of his puzzle mysteries its solution revolves around railway timetables as well as the possible distance a boat could cover in a certain time.

Crofts' admiration for the Royal Ulster Constabulary, and implicitly the Northern Irish state, is clear throughout the novel although it features little direct reference to politics. In spite of this it was published in the Irish Free State and translated into Gaelic.