The editors and the readers of this Journal alike have suffered a grievous loss through the death at the age of 85 in his home at Kuesnacht of Professor C. G. Jung. To many in both these groups the loss is a personal one, while to psychology as a whole it is irreparable. A penetrating original thinker, a tireless inquirer, a perceptive observer, and a lucid expositor, Jung stands almost alone as to the significance of his contribution to the development of psychology and its related fields, upon which he left his characteristic impress for all time. In a future issue of this Journal there will be published a Memorial to the founder of Analytical Psychology to which a number of those who have worked with Jung or have been influenced by his theories will give their individual estimates of the nature of the contribution that he has made to the science of man.