Miller was born in England in 1893. He began working with the Leprosy Mission in 1921 and contributed to its growth in a multitude of ways for fifty years, first as a missionary in India and later as general secretary for eighteen years.

After he retired in 1960, he became a member of the General Council of the Mission. He is author of several books on general and humanitarian aspects of leprosy.

International Journal of Leprosy, Centennial Festskrift edition, Vol 41, No 2. 1973.