The strip from Covent Garden to Temple is the most literary mile in London. Cecil Court is the antiquarian bookshop alley that seems to belong to a different century. Charing Cross Road is diminished from its bookselling heyday but Foyles and the remaining secondhand shops are still worth an hour. Somerset House has the Courtauld Gallery inside it — Manet, Monet, Degas in a sequence of rooms that is one of London's best museum experiences.
The Temple is the destination: the Inns of Court occupy a riverside precinct east of Fleet Street that has been the legal quarter since the 13th century. Temple Church is inside this precinct. The round Norman nave, the crusader effigies, and the fact that it's completely unknown to most visitors make it the walk's surprise.