This was quickly done, and a thrill ran quivering through the Emir as he saw the Hakim take out a keen knife from the case that hung from his girdle, and with a quick movement divide the white garment the patient wore from neck to waist, laying bare the muscular back and side, and as quickly laying the soft white cotton fabric apart. “Now,” said the Hakim, “tell the Emir that the thick curtains must be lowered over that window and all the light shut out. That done, whatever takes place no one must move or speak.”

The words were firmly and solemnly uttered, and the place lending itself well to the purpose, the heavy rug-like curtains were allowed to fall over the window, the Emir and his son both helping, and then stopping in amaze by the drapery as for a few moments the chamber was in total darkness.

Then a strange, hissing noise arose, and heavy, startled breathing was heard, while the faces of all present were illumined by the dazzling flashes of light which began to play in a cylinder of glass.

Nothing could have been more startling to one strange to the wonders of science, for the scene was horrible and weird, suggestive to the Baggara—chiefs and Mullahs—of magic in its most awful guise. For as they stood spellbound there by the strange light which played about as if some hissing, fiery dragon were flickering its lambent tongue in and out of its glistening jaws, not only were the faces and busy hands of the Hakim and his assistants seen moving rapidly, but directly after there, in a faint glare, was the bare torso of the dying Emir.

Then, heard above the hissing of the electricity the Hakim’s voice was heard, and all eyes were turned to him as the flashes of light brightened his stern, firm face.

“Ibrahim,” he said, “bid the Emir come here to my side.”

The order was interpreted, and firmly and without a moment’s hesitation, the swarthy chief walked close up to the divan, noting as he did so that the flashes of light in the cylinder glanced from the keen knife which the Hakim held.

“Now,” said the latter calmly, “tell him that as a last effort I am about to try and find where the bullet which is slaying his friend is lying.”

The Sheikh’s voice trembled a little as he spoke, but he interpreted the words clearly, and the Emir said softly—

“The Hakim is wise and great.”