The explosion was heard twenty miles away. It killed boatmen and wrecked the exotic villa of Lawrence Alma-Tadema, the fashionable St John's Wood artist. But what caused the 1874 Regents Park explosion? Fenian bombs? Sabotage by rival railways or other firms? Or was it something personal? And whose was the other body found in the canal? An artist's model? The missing King's Cross barmaid? Or another victim of the so-called Thames murderer? As he struggles to find the answers, Scotland Yard's Sergeant Ernest Best straddles the conflicting worlds of art, wealth and privilege and that of the poverty-stricken canal boatmen in an intriguing mystery that will change his life forever.

The collision of the Princess Alice pleasure steamer with the Tyne collier, Bywell Castle, in the Thames in September 1878 resulted in Britain's worst-ever inland waterway accident. Almost 650 Princess Alice passengers and crew died. Whole families were wiped out; many children were left orphans; parents childless. The nation wept. Joan Lock describes vividly the lead up to the accident, the disaster itself and its aftermath. She then delves into the quarrels that the tragedy devolved into, as each side blamed the other during the extended inquiries to discover just how the accident happened and why so many people drowned. In the process, the author makes a startling discovery...

When the bodies of a number of babies are found scattered around Islington, Detective Sergeant Best is sent undercover to lodge next door to a suspected baby farm. He shadows an alleged 'child dropper' onto a Thames pleasure steamer and finds himself caught up in Britain's worst civilian tragedy — the 1878 sinking of the Princess Alice — a horrific experience which will haunt Best forever. Meanwhile, his determination to avenge the death of a young girl he had befriended and save the life of another becomes a crusade.

It is a beautiful warm August day in 1880: perfect weather for the annual Metropolitan Police Annual Fete held at Alexandra Palace. Inspector Best is summoned to uncover the identity of 'Quicksilver' who has send an anonymous note threatening to cause an horrific explosion at the event. When a second note is received and its threats become increasingly confusing with their literary allusions, Best seeks out the help of Helen Franks, a close friend from the past. However, is Quicksilver really intent on causing mass injury on this fine day, or is his desire of a more personal nature?