Arthur Mills (b. 1926) is a British organist composer and academic whose compositions span seven decades from 1958 to the present day. He was Director of Music at Ely Cathedral from 1958 to 1990 and a Professor of the Royal Academy of Music from 1964 to 1992.  His setting of the Missa Brevis was first written in 1960 and dedicated to Christopher Campling who at the time was a canon of Ely Cathedral. It was revised in 1964 when the Gloria was added. It is scored for Unison Voices with Organ Accompaniment.

Here is a lively American singing game arranged for young treble singers in such a way that the parts almost teach themselves! The verse/refrain is in pentatonic so the canonic harmonies are easily learned. Great for teaching sight-reading too!