In pictures: The Appin Murder

A new exhibition examining one of Scotland's most celebrated miscarriages of justice has opened in Edinburgh.

James Stewart was hanged 250 years ago after being convicted as an accessory to the murder of Colin Campbell of Glenure.

However, many people were convinced that James of the Glen was innocent - and the identity of the killer remains a mystery.

The National Archives for Scotland has put on display photographs by archivist RM Gibson and documents and letters relating to the case, which was immortalised in Robert Louis Stevenson's novel Kidnapped.

A cairn on the old road from Ballachulish to Duror marks the place where the factor was shot

A description of Allan Breck Stewart, one of those suspected of the murder

James Stewart was sentenced to be hanged after being found guilty. In 1911 a memorial was placed at the site of his execution

The murder was commited in Argyll in the west of Scotland

Robert Louis Stevenson immortalised the murder in his novel Kidnapped