sentences:  He became famous as an exceptional teacher of counterpoint, and wrote several texts including "Introduction to Counterpoint" (Oxford 1944), "Contrapuntal Technique in the Sixteenth Century" (Oxford, 1922), "Foundations of Practical Harmony and Counterpoint", Volume 1 of "The Oxford Harmony" (1946), and "The Structure of Music" (Oxford, 1935).From 1926 for two years he taught at the Curtis Institute in Philadelphia.His students included the composers Gerald Finzi, Sir Michael Tippett, Constant Lambert, Robin Milford, Anthony Milner, Edmund Rubbra, Bernard Stevens and Jean Coulthard.