Mortimer Cleveland

In the short story SOS, Mortimer Cleveland is an authority on mental science. He has written two books on the subconscious and is a member of the Psychical Research Society. He is also a student of the occult.

When he was driving on the Wiltshire Downs his car broke down and he walked for about twenty minutes, until he came to a cottage on the Downs. Mr Dinsmead offered him tea and a room for the night. Mr Cleveland felt that something wasn't right with the place or the people living there, but he couldn't put his finger on it. Later, when he entered the bedroom, someone had written SOS in the dust on the dresser.