Mystery and Crime Sayers, Dorothy L: Clouds of Witness, v.1, 10 August 2008.

[Patricia]

Dorothy L. Sayers (1893–1957)
Clouds of Witness (1926)
Revised and corrected edition, 1935.

This classic detective story appeared yesterday on PG Canada.
(We already have ‘Whose Body?’ by the same author.)

From Wikipedia:
“The fiancé of Lord Peter's sister, Lady Mary Wimsey, is found dead outside the conservatory of the family's shooting lodge in Yorkshire. Peter and Mary's elder brother, the Duke of Denver, is charged with capital murder and put on trial in the House of Lords.
The novel's title alludes to Hebrews 12:1: "we also are compassed about with so great a cloud of witnesses." In solving the mystery, Lord Peter's problem is the opposite of the usual case: rather than having too few clues to go on, there are too many, and Peter pursues several avenues that turn out to be false before hitting on what really happened.”