The Ivory Dagger

Herbert Whitall, a wealthy disagreeable bachelor is murdered shortly before he is due to be married. His fiancee is found standing over his body in a bloodstained dress - her guilt seems obvious, but she claims to have been sleepwalking. her aunt calls on Miss Silver to solve the case.

This is quite an enjoyable murder mystery, with a houseful of suspects, all of whom have good reason to want herbert Whitall dead, and despite the presence in the house of several policeman, it naturally is Miss Silver who sorts out which is the guilty one.