A bible worth £1000 was found lying on a bench in the centre of the capital.
The large book dates from the 1860s and is an edition of the Rev John Eadie illustrated national family bible.
It has full Morocco binding with brass clasps and an embossed logo on the cover.
A member of the public found the bible lying on a bench of the north side of Queen Street at the junction with North Castle Street at around 5.15pm on Wednesday.
They handed it into the police who are now trying to reunite it with its owner.
A Lothian and Borders Police spokesman said: "The bible is large and distinctive, and we are appealing for any information that can help us reunite it with its owner.
"It is likely that someone has misplaced the bible and forgotten about it, so we would urge anyone who owns a copy of this bible to check that they still have it.
"If it is missing then we would urge them to contact police, likewise anyone who thinks they know who it belongs to should also get in touch."
Anyone with any information should contact police on 0131 311 3131.
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