Midnight at Marble Arch, by Anne Perry
The Book Thomas Pitt is now the head of Special Branch and his former boss, Victor Narraway has been "elevated" to the House of Lords. The new job means Pitt and his wife Charlotte now have a number of social functions the should attend in order for Pitt to keep up with his job. Charlotte realizes she doesn't really miss it, when she decides she rather likes Isaura Castlebranco, the wife of the Portuguese ambassador. While at the party, Charlotte and Aunt Vespsasia (Lady Vespasia Cumming-Gould) witness a spoiled, rich young man being verbally cruel the Isuara's daughter, Angeles. Charlotte attempts to intervene. Meanwhile, Pitt and Narraway are having a conversation with successful financier Rawdon Quixwood, when the police approach. Thinking he's needed, Pitt has a conversation with the constable, but it's not Pitt the constable needs to see, it's Quixwood. His wife was brutally murdered and now, he's got to go identify the body. Narraw...
