A Duty to the Dead by Charles Todd

In 1916, Nurse Bess Crawford is drawn into the secrets of the Graham family when she promises to deliver a message from a dying solider, Arthur, to his younger brother, Jonathan. After speaking with Jonathan, Bess becomes concerned that Arthur's last wishes won't be followed. She also learns that the family's eldest son, Peregrine, has been in a mental institution for murder since he was a teen. Wondering if Arthur's words had something to do with Peregrine causes Bess even more unease and she realizes that she must find out what happened all those years ago. A Duty to the Dead is the first book in the Bess Crawford series. Last month, I read the second, An Impartial Witness. I enjoyed this mystery just as much.