Peter Termayne is, as I understand, best known for his series of historical mysteries featuring Irish nun Sister Fidelma, which I have recently begun reading. However, he has written mysteries set in other eras, including the more-or-less modern one, and some of his shorter offerings are collected in Ensuing Evil and Others: Fourteen Historical Mysteries.
It's quite an interesting range, from a murder mystery set in the castle of the historical MacBeth and his lady Gruoch, to a modern locked-room mystery set in an airplane in flight. In between we visit the theatre district of Shakespeare's England, the well-known occupants of 221B Baker Street, a battleship during the Napoleonic Wars, the London of Charles Dickens and Wilkie Collins, and India under the British Raj, plus a bonus Sister Fidelma story. An enjoyable read.