It's worth noting that Cornwall Songwriters who include in their number Mike O'Connor, Jon Heslop, Lucy Burrows, Roger Bryant, Tony Truscott, Kathy Wallis, Ron Openshaw et al, all have in their repetoire, traditional Cornish songs. They don't just write new songs. Mike has a vast collection of traditional songs and music which have been published,   Kathy sings traditional cornish songs which have been recorded, Tony Truscott won a competition at Pan Celtic for his songs in Cornish and both Tony and Mike have been made Bards of the Cornish Gorseth for their contribution to music in Cornwall. Contact any of them and they'll all be pleased to help in whatever way they can.