An estate agent was attacked at a Wiltshire house she had arranged to show a prospective buyer round.
The woman was assaulted from behind as she walked into the property in The Muddle, Market Lavington, on Monday.
It is thought she had gone to the empty home after a man calling himself Mr Herring made an appointment to see it.
Police say there is no reason to link it with estate agent Suzy Lamplugh, who went missing in 1986 after going to meet a client called "Mr Kipper".
Miss Lamplugh - who disappeared in London - is believed to have been murdered, although her body has never been found. She was officially declared dead in 1993.
Wiltshire Police are warning female estate agents not to make appointments to meet people on their own in the wake of Monday afternoon's incident.
They said the 48-year-old woman was pushed over, falling into a wall, before being attacked with a sharp object, leaving her with minor injuries to her arms.
Her assailant ran off, and officers are keen to speak to anyone who was in the area at the time who may have seen him.