Summary: Near Valtos, in Trotternish on the Isle of Skye, there is an old dun called the Dùn Dearg. There is a story connected to it – a story called ‘The Giants of Dùn Dearg’. Find out more about these giants and what happened to them in this week’s letter. Accompanying text is available in both English and Gaelic at bbc.co.uk/litirbheag