Markings on a 16th Century carving from Stirling Castle could be the oldest surviving piece of written Scottish instrumental music, historians believe.

A sequence of 0s, Is and IIs have been found on one of the Stirling Heads - wooden medallions which would have decorated the castle's royal palace.

It is believed the music could have been played on instruments such as harps, viols, fiddles and lutes.

An experienced harpist has been trying to play the tune.