Nasty Things, Murders

As they talk about the murder, to the horror of three of them, it appears that the fourth - gentle Mary - may have been the murderess!

When Mary leaves the room, the others consult the Matron as to what steps should be taken

However, on Mary's return a most unexpected telephone conversation sets their fears at rest and leaves them feeling rather foolish

But after they have gone and Mary is left alone, her behavior is strange, to say the least ...