Summary: Ruairidh was telling you about Keith Norman MacDonald. He published the book Puirt-a-Beul: or Songs for Dancing as Practised from a Remote Antiquity by the Highlanders of Scotland in 1901. Was Keith Norman correct? Are puirt-à-beul very old? It’s difficult to be certain. Ruairidh looks at these questions and others in this week's letter. Accompanying Gaelic text, grammar points and vocabulary are all available at bbc.co.uk/litir
