Anyone who is familiar with Hope’s results is aware that over many of the psychic faces there appears a roll or arch of some peculiar substance which has never been explained upon any supposition of fraud, but is so constant that it would appear to be part of the psychic process. Some of us have always contended that probably this arch represents a formation corresponding to the Cabinet upon this side—an envelope or enclosed space within which psychic forces are generated and condensed. The arch is by no means peculiar to Hope, though the exact form and texture of it is such that one could pick out a Hope photograph among a hundred others. This psychic arch, as it has been named, appears in many forms and many places, some of them very unexpected. I have, as an example, a photograph before me as I write which was taken by Mr. Boyd, the respected provost of a Scotch borough, upon a recent journey which he made upon the West Coast of Africa. On taking a small group of natives he found an extra of a woman and child (negroes) upon his plate. This extra figure is surrounded and surmounted by the psychic arch in an exaggerated form. Mr. Boyd has no axe to grind, and, so far as I know, he is not even a spiritualist. How comes it, then, that his result fits so definitely into the arch system, if it be not that there is some general law which regulates results whether they be obtained in Crewe or on the Gold Coast? Again, I have a friend, an amateur, who has himself developed psychic photography from the time that it was a mere luminous blur upon his plates, until now he receives very graceful and perfect pictures which are in some cases recognised faces of the dead. In his case the arch adjusts itself into the form of an artistic hood or mantilla. But the arch principle carries on. It is only by a comprehensive view of this sort, and by the comparison of different independent results, that we are likely to get at some of the laws which underlie this matter. At present the system adopted in quarters which should be responsible ones is to concentrate attention upon whatever may seem to be failure or deception, and to take no notice at all of the broader aspects of the question. In every science the methods of advance are to pay strict attention to the positive results and to regard the negative ones as mere warnings of what to avoid. This process has been reversed in considering psychic photography, and the world has been deceived by those who should have been its guides. Truth will, of course, prevail, but its progress has been grievously retarded by this unhappy and unscientific mental attitude.