Harold Hoeffding.  The Philosophy of Religion.  London, 1906.

Edmond Holmes.  What Is and What Might Be.  London, 1911.

—­Give me the Young, London, 1921.

Baron Fredrick von Huegel.  The Mystical Element of Religion.  London, 1908.

—­Eternal Life:  A Study of its Implications and Applications.  London, 1912.

—­Essays and Addresses on the Philosophy of Religion.  London, 1921.

Jacopone da Todi.  Le Laude, secondo la stampa fiorentino del 1490.  A cura di G. Ferri.  Bari, 1915.

William James.  The Varieties of Religious Experience.  London, 1902.

William James.  The Will to Believe and other Essays.  London, 1897.

—­Principles of Psychology.  London, 1901.

St. John of the Cross.  The Ascent of Mount Carmel, trans. by David Lewis.  London, 1906.

—­The Dark Night of the Soul, trans. by David Lewis.  London, 1908.

Sir Henry Jones and J.H.  Muirhead.  The Life and Philosophy of Edward Caird.  Glasgow, 1921.

Rufus Jones.  Studies in Mystical Religion.  London, 1909.

—­Spiritual Reformers in the Sixteenth and Seventeenth Centuries.  London, 1914.

Julian of Norwich.  Revelations of Divine Love, edited by Grace Warrack.  London, 1901.

C.G.  Jung.  The Psychology of the Unconscious.  London, 1916.

Kabir.  One Hundred Poems, edited by Rabindranath Tagore and Evelyn Underhill.  London, 1915.

Thomas a Kempis.  The Imitation of Christ:  the Earliest English Translation (Everyman’s Library).  London, n.d.

S.  Kettlewell.  Thomas a Kempis and the Brothers of the Common Life.  London, 1882.

William Law.  Liberal and Mystical Writings, edited by W. Scott Palmer.  London, 1908.

W.P.  Livingstone.  Mary Slessor of Calabar.  London, 1918.

Journal Spirituel de Lucie-Christine.  Paris, 1912.

W.  McDougall.  An Introduction to Social Psychology, 9th ed.  London, 1915.

—­The Group Mind.  Cambridge, 1920.

W.M.  McGovern.  An Introduction to Mahayana Buddhism.  London, 1921.

Mechthild of Magdeburg.  Das Fliessende Licht der Gottheit.  Regensburg, 1869.

Reynold Nicholson.  Selected Poems from the Divani, Shamsi Tabriz.  Cambridge, 1898.

—­Studies in Islamic Mysticism.  Cambridge, 1921.

J.H.  Overton.  John Wesley.  London, 1891.

William Penn.  No Cross, No Crown.  London, 1851.

Plotinus.  The Ethical Treatises, trans. from the Greek by Stephen Mackenna.  London, 1917.

Plotinus.  The Physical and Psychical Treatises, trans. from the Greek by Stephen Mackenna.  London, 1921.

J.B.  Pratt.  The Religious Consciousness; a Psychological Study.  New York, 1921.