which has enabled him to both invent and test several new devices, including the common gyroscopic attachment which is known by his name.  The main body of the manuscript is written neatly in ink, but the last few lines are in pencil and are so ragged as to be hardly legible—­exactly, in fact, as they might be expected to appear if they were scribbled off hurriedly from the seat of a moving aeroplane.  There are, it may be added, several stains, both on the last page and on the outside cover which have been pronounced by the Home Office experts to be blood—­probably human and certainly mammalian.  The fact that something closely resembling the organism of malaria was discovered in this blood, and that Joyce-Armstrong is known to have suffered from intermittent fever, is a remarkable example of the new weapons which modern science has placed in the hands of our detectives.

And now a word as to the personality of the author of this epoch-making statement.  Joyce-Armstrong, according to the few friends who really knew something of the man, was a poet and a dreamer, as well as a mechanic and an inventor.  He was a man of considerable wealth, much of which he had spent in the pursuit of his aeronautical hobby.  He had four private aeroplanes in his hangars near Devizes, and is said to have made no fewer than one hundred and seventy ascents in the course of last year.  He was a retiring man with dark moods, in which he would avoid the society of his fellows.  Captain Dangerfield, who knew him better than anyone, says that there were times when his eccentricity threatened to develop into something more serious.  His habit of carrying a shot-gun with him in his aeroplane was one manifestation of it.

Another was the morbid effect which the fall of Lieutenant Myrtle had upon his mind.  Myrtle, who was attempting the height record, fell from an altitude of something over thirty thousand feet.  Horrible to narrate, his head was entirely obliterated, though his body and limbs preserved their configuration.  At every gathering of airmen, Joyce-Armstrong, according to Dangerfield, would ask, with an enigmatic smile:  “And where, pray, is Myrtle’s head?”

On another occasion after dinner, at the mess of the Flying School on Salisbury Plain, he started a debate as to what will be the most permanent danger which airmen will have to encounter.  Having listened to successive opinions as to air-pockets, faulty construction, and over-banking, he ended by shrugging his shoulders and refusing to put forward his own views, though he gave the impression that they differed from any advanced by his companions.

It is worth remarking that after his own complete disappearance it was found that his private affairs were arranged with a precision which may show that he had a strong premonition of disaster.  With these essential explanations I will now give the narrative exactly as it stands, beginning at page three of the blood-soaked note-book: