Many thanks to you all, Barra, George, Philippa and Malcolm. I'll pass on your various tips to my friend, and will be back if I get any more specific instructions. I had a feeling all along that there might be a good reason why it's so hard to find shanties in Gaelic. Just like I imagine there are very few authentic reggae songs in Icelandic! If people aren't going to sea in large numbers, they're unlikely to sig shanties!