These pedagogical works, his compositions and his transcriptions are edited by Boosey and Hawkes of New York, Chanterelle Verlag of Heidelberg, Barry Editorial of Buenos Aires and Henry Lemoine of Paris.
Clark is the son of Anglo-Indian parents, his father Bruce Clark who is from Madras (now Chennai) was a student at Christ Church Anglo Indian-High School Madras, and his mother Mary Clark (née Boosey) is from the Kolar Gold Fields, Karnataka, India; her family is a famous sporting family.