Under the Dragon's Tail (Detective Murdoch #2) by Maureen Jennings

Women rich and poor come to her, desperate and in dire need of help – and discretion. Dolly Merishaw is a midwife and an abortionist in Victorian Toronto, but although she keeps quiet about her clients’ condition, her contempt for them and her greed leaves every one of them resentful and angry. So it comes as no surprise to Detective William Murdoch when this malicious woman is murdered. What is a shock, though, is that a week later a young boy is found dead in Dolly’s squalid kitchen. Now, Murdoch isn’t sure if he’s hunting one murderer – or two.