Ticket to Oblivion (The Railway Detective Series)

 Summer, 1858. Young Imogen Burnhope and her maid Rhoda board a non-stop train to Oxford to visit Imogen’s Aunt Cassandra, who waits on the platform at the terminus to greet them. All the passengers alight at Oxford, but the two women are nowhere to be seen. The train is searched and the coachman swears he saw them join first class, however they seem to have vanished into thin air