The violin sonata was composed over a period of about 2 years between 1964 and 1966, when I started learning about musical composition at Morley College in London. I had a wonderful teacher there, Jeremy Dale Roberts, who later became Head of Composition at the Royal College of Music. I much regret to say that Jeremy died recently, in July 2017. One of his great strengths as a teacher was that whenever a student brought some work along to show him he could immediately see what the student was trying to achieve. Then he would (if necessary) suggest a way of doing it better. I had quite a lot of such help from Jeremy while I was working on this sonata, so perhaps a better way to describe its authorship would be "by Oliver Penrose under the tuition of Jeremy Dale Roberts."