Jeffery was a popular New Thought author and lecturer for most of the first half of the twentieth century. He had come into New Thought through the efforts of Charles Brodie Patterson and studied with Emma Curtis Hopkins, with whom he collaborated while she was writing her classic study, High Mysticism. He studied in England with Thomas Troward and was associated for a period with the Unity School of Christianity. During his mature years he produced a number of books developed out of the concepts of High Mysticism, including: The Principles of Healing (1939), Coordination of Spirit, Soul and Body (1948), and Mystical Teachings (1954).
Agnes Sanford in Sealed Orders, chapter 14 talks about Emmett Fox and his book The Sermon on the Mount. She writes “The only book in which I have found this matter treated in a practical rather than a theological manner is a thin book of lectures called What Seek Ye? by H.B. Jeffery, another “student of truth.”
*Source of this biography is not known.