As many of Bergson's contributions to French periodicals remained relatively inaccessible, he had them published in two volumes. The first of these was being planned when war broke out. The conclusion of strife was marked by the appearance of a delayed volume in 1919. It bears the title "Spiritual Energy: Essays and Lectures" (reprinted as "Mind-Energy" – "L'Énergie spirituelle: essais et conférences"). The advocate of Bergson's philosophy in England, Wildon Carr, prepared an English translation under the title "Mind-Energy". The volume opens with the Huxley Memorial Lecture of 1911, "Life and Consciousness", in a revised and developed form under the title "Consciousness and Life". Signs of Bergson's growing interest in social ethics and in the idea of a future life of personal survival are manifested. The lecture before the Society for Psychical Research is included, as is also the one given in France, "L'Âme et le Corps", which contains the substance of the four London lectures on the Soul. The seventh and last article is a reprint of Bergson's famous lecture to the Congress of Philosophy at Geneva in 1904, "The Psycho-Physiological Paralogism" (Le paralogisme psycho-physiologique), which now appears as "Le cerveau et la pensée: une illusion philosophique". Other articles are on the False Recognition, on Dreams, and Intellectual Effort. The volume is a most welcome production and serves to bring together what Bergson wrote on the concept of mental force, and on his view of "tension" and "detension" as applied to the relation of matter and mind.