Lionel Tertis is regarded as “the father of the viola.” Although he was not its inventor, he was the first musician to concertize internationally as a soloist on this marvelously multifaceted instrument and to inspire leading composers to produce music for it. While retracing this violist’s path, Christian Euler chanced on three English compositions by Bliss, Bax, and Vaughan Williams and is now presenting these rediscoveries with the pianist Paul Rivinius. The works could not be more different and display the viola’s overwhelming potential in all its great breadth.