(Hazrat Inayat Khan lived in London during and immediately after World War I. Several of his addresses and lectures given between 1916 and 1921 were noted down without indication of place and date. These are referred to below as 'manuscripts from the early London period.')

PART I: The Smiling Forehead

THE SMILING FOREHEAD - London, 18th June, 1922
THE HEART QUALITY 1 - Suresnes, France, 6th September, 1925
THE HEART QUALITY 2 - Suresnes, 22nd August, 1926
THE HEART, APHORISMS - those aphorisms which were not published in Volume XI of this series are taken from Hazrat Inayat Khan's personal notebooks and from a collection of one of his disciples; the last item is a 'phrase to be repeated'. (Phrases to be repeated - See 'The Value of Repetition and Reflection' in Volume 11 (2nd revised edition) of this series.)
THE PATH OF DEVOTION - a manuscript from the early London period
LOVE-IDEAS, STORIES, ANSWERS AND APHORISMS - taken from Hazrat Inayat Khan's personal notebooks, from reports by his disciples, from questions and answers exchanged in Suresnes, Summer 1923; the last two items are 'phrases to be repeated'.
THE DIFFERENCE BETWEEN WILL, WISH AND DESIRE - Suresnes, 27th June, 1926
DESTINY AND FREE WILL - New York, 19th January, 1926
FREE WILL AND DESTINY - Suresnes, 12 July, 1925
KISMET - England, 1st July, 1917
FREE WILL, APHORISMS - same documents as mentioned for 'The Heart'
THE SEER 1 - a manuscript from the early London period
THE SEER 2 - Suresnes, Summer 1923
DOES THE CONSCIOUSNESS SEE WITH THE PHYSICAL EYES? - a manuscript from the early London period
SEEING - Suresnes, 30th August, 1926
THE DIFFERENT STAGES OF SPIRITUAL DEVELOPMENT - Suresnes, 9th August, 1925
THE PROPHETIC TENDENCY - THE PROPHETIC MISSION - a manuscript from the early London period
POINTS OF VIEW HELD BY SPIRITUAL PERSONS - original title: The Different Points of View of Spiritual Persons, Suresnes, 8th August, 1926
HIGHER SPIRITUALITY - England 1920, reported by Dr Gruner as 'a partial paraphrase from a short discourse'.
THE PROCESS OF SPIRITUAL UNFOLDMENT - New York, 12th January, 1926; this lecture has been reconstructed from incomplete shorthand notes
THE AWAKENING OF THE SOUL 1 - Paris, December 1924
THE AWAKENING OF THE SOUL 2 - Detroit, 12th May, 1926
THE AWAKENING OF THE SOUL 3 - New York, 26th January, 1926
THE DANCE OF THE SOUL 1 - London, 11th May, 1921
THE DANCE OF THE SOUL 2 - Paris, June 1921

PART II: The Deeper Side of Life

THE DEEPER SIDE OF LIFE 1 - New York, December 1925, an article destined for newspapers
THE DEEPER SIDE OF LIFE 2 - an article from 'The Sufi Quarterly', December 1925
MAN, THE SEED OF GOD 1 - Geneva, 15th October, 1923
MAN, THE SEED OF GOD 2 - Brussels, 16th December, 1923
SUFI PHILOSOPHY 1 - Los Angeles, 22nd March, 1926
SUFI PHILOSOPHY 2 - San Francisco, 5th April, 1926
THE GIFT OF ELOQUENCE - London, probable date December 1916
EVOLUTION OF THE WORLD - a manuscript from the early London period
EVERY MAN HAS HIS OWN LITTLE WORLD - manuscripts from the early London period
MARRIAGE - Suresnes, 20th September, 1926
SPIRITUALITY, THE TUNING OF THE HEART 1 - Oakland (Calif), 20th February, 1926
SPIRITUALITY, THE TUNING OF THE HEART 2 - San Francisco, 9th April, 1926
OPTIMISM AND PESSIMISM - Suresnes, 6th August, 1922
CONSCIENCE - QUESTIONS AND ANSWERS - The first two items and the last one, Los Angeles, 25th March, 1926; the other items, Suresnes, 20th July, 1923
JUSTICE AND FORGIVENESS - QUESTIONS AND ANSWERS - Suresnes, Summer 1923
PAIRS OF OPPOSITES USED IN RELIGIOUS TERMS - Paris, 14th November, 1925
What do you mean by God has no opposite? - Suresnes, 17th July, 1923
God is not kind only to a few - from early London period
How could God allow bloodshed? - from early London period
As evil cannot come out of good - Suresnes, September 1924
Why do people who do evil succeed - Paris, 29th November, 1923
INSIGHT - Suresnes, Summer 1922
THE LAW OF ATTRACTION - England, February 1917
THE LIBERAL AND CONSERVATIVE POINT OF VIEW - Suresnes, 30th July, 1922
THE ATTITUDE - Suresnes, December 1922
THE LAW OF LIFE - 28th March, 1924
THE LAW OF ACTION - a manuscript from the early London period
THE SOUL, ITS ORIGIN AND UNFOLDMENT - Chicago, 28th April, 1926
THE UNFOLDMENT OF THE SOUL - Paris, 8th November, 1925
DIVINE IMPULSE - London, 26th January, 1924
THE SYMBOL OF THE CROSS 1 - from the early London period
THE SYMBOL OF THE CROSS 2 - England, 1920
THE MYSTICAL MEANING OF THE RESURRECTION 1, 2 - manuscripts from the early London period
SPIRITUAL CIRCULATION THROUGH THE VEINS OF THE UNIVERSE - London, 28th January, 1924
THE DIVINE BLOOD CIRCULATING THROUGH THE VEINS OF THE UNIVERSE - Paris, 9th December, 1923