Sir Richard Runciman Terry (3 January 1864 – 18 April 1938) was an English organist, choir director, composer and musicologist. He is noted for his pioneering revival of Tudor liturgical music.
Terry was a composer of church music, most notably of hymn tunes, several of which are in use today. These include Highwood (to the words 'Hark, what a sound' and 'O Perfect Love'), Billing (setting 'Praise to the holiest in the height'), and many carols, including the popular Myn Lyking.

https://en.wikipedia.org/wiki/Richard_Terry_(musicologist)