The detail of the mysterious picture was amazing. Its art was unique—the art of a cultured, luxurious civilisation which had long been forgotten, even in the age when our lord Mahomet lived—but in it was one feature so curious and remarkable that its sight held me breathless, agape, transfixed.

The tablet, fashioned from the solid rock, was of great extent, with life-sized figures in bas-relief, sculptured with consummate skill, and as soon as my eyes caught sight of it I recognised its great antiquarian value. The study of forgotten nations had always attracted me from boyhood. Indeed, I had followed the example set by my father, who was perhaps the best-known antiquarian among the Arabs of Algeria, and was frequently sought out by travellers interested in the relics of bygone ages. While I was still a lad, he, at that time living in Constantine, met an Englishman named Layard, who came to examine the inscriptions at the Bab-el-Djabia and the ruins at Sidi Mecid, and subsequently embraced the opportunity of accompanying him through Kurdistan and Mesopotamia as interpreter. Afterwards, he assisted in the excavations on the sites of ancient Babylon and Nineveh, where many wonderful archaeological treasures were brought to light. He was present when the great winged bull was discovered beneath the mound of Nimroud, and on account of the keen interest he took in the various sculptures unearthed, and his ability to sketch them, he was promoted to be one of the Englishman’s chief assistants. Thus, from the first great discovery of Assyrian remains, my father had been enabled to study them, and when he returned home four years later, he brought with him many copies of strange cuneiform inscriptions, and drawings of curious sculptures, all of which interested me intensely. From him I thus derived my knowledge of the inscriptions of Babylonia, imperfect though it might be, but yet of sufficient extent to enable me to discern the Arabic equivalents of the strange lines of arrowheads graven upon this rock, and forming part of the picture I had so unexpectedly discovered. While at college in Algiers, I had eagerly devoured the few books in French, explaining the monuments of Babylonia, and in London had continued the study, by that means adding to the knowledge I had already gained under the tuition of my father. Few sons of Al-Islâm are archaeologists, but, as with my father, so also with me, the study had been a hobby, and on many occasions the French professors had expressed surprise at the extent of my knowledge of that strange language known as cuneiform.

By the dress and physiognomy of the figures portrayed upon the rock-tablet, I at once discerned they were not ancient Egyptian, as I at first believed, but Assyrian. The general arrangement of the picture showed it to be a record of similar character to those found in the wonderful buried palaces of Nineveh and Babylon.

In the faint glimmer of light I stood straining my eyes upon this silent record of a forgotten age. The first object I distinguished was a winged circle at the right-hand corner; the emblem of the Babylonian supreme deity. Below, in a chariot drawn by three handsomely-caparisoned horses, were three warriors in coats of mail, one being in the act of discharging an arrow at the enemy, one driving, and the third shielding his companions. The trappings of the horses, and the decorations of the chariot itself consisted of stars and other sacred devices, while at the side was suspended a quiver full of arrows, and the helmets of the warriors showed them to belong to the early Babylonian period. Following the chariot was a eunuch on foot, with a bow over his shoulder, a quiver slung behind, and bearing in his hand a kind of mace.

He was represented attired in a dress ornamented richly with gold and heavy fringe, while his upper garment was apparently a golden breastplate, across which showed the band by which the quiver was suspended. He wore no head-dress, and his feet were bare, but his position and bearing denoted that he was the servant of a monarch. Behind him there was depicted a chariot, not so gorgeously decorated as the first, drawn by two horses and led by two men, probably eunuchs. Over the horses’ heads rose high plumes, three in number, tassels fell over their foreheads and hung around their necks, together with rosettes, engraved beads and the sacred star; their tails were bound in the centre by ribbons, and suspended from the axle of the chariot was a large tassel. Standing behind, as if already passed by the expedition, the sacred tree was elaborately and tastefully portrayed, the tree bearing a large number of those mystic flowers that are so prominent a feature in early Babylonian decoration, showing that the dwellers within that wonderful city were possessed of highly-refined taste. Below was a picture of two scribes, writing down the number of heads and the amount of spoil, while the tablet behind them was occupied by many lines of graven arrowheads.

Underneath was pictured, in graphic detail, a peaceful, religious procession of gods, borne on the shoulders of warriors. Each figure was carried by four men: the first was that of a female seated on a throne, holding in one hand a ring, in the other a kind of fan, and on the top of her square, horned cap was a star. The next figure was also that of a female, wearing a similar cap, seated in a chair, and holding in her left hand a ring; she was also carrying something in her right hand, but its form I could not distinguish. The third figure puzzled me considerably; it was much smaller in its proportions than those preceding it, was half-concealed in a case or box, and had a ring in the left hand; while the fourth was that of a man in the act of walking, holding in one hand a thunderbolt, and the other an axe, evidently the Babylonian deity, Belus or Baal. Upon the identity of the other gods I was undecided, but in the right-hand corner of the tablet was sculptured a figure of the goddess Istar, the Assyrian Venus, draped and standing erect on a lion, crowned with a mural coronet, upon which was a star, denoting her divinity. In one hand she was represented as bearing the moon, and the other grasped two objects which had first attracted my attention and riveted my gaze. She was holding out two serpents, entwined in such a manner as to form the puzzling device with which my breast was branded—the Mark of the Asps!

Taking a small, flat stone, I stood on tiptoe and carefully scraped away the dirt of ages from that portion of the sculpture, finding underneath the two serpents engraven in minute detail. Then I scraped the dress of the eunuch and found the same symbol there depicted. Save in one or two instances, the ages that had passed since the great rock-tablet had been hewn had left it untouched. The deeper portions of the picture were, however, filled with dark grey moss and the accumulated dirt of centuries, but with the aid of the stone I commenced to scrape the inscriptions and very soon succeeded in so far cleaning them that the lines were decipherable.

It was apparent that the intention of the sculptor had been to portray, at the base of the picture, the procession of gods being carried into the Temple of Istar, or Astarte, but the reason she bore in her hand the entwined serpents was a mystery inscrutable. Upon the walls of the palaces at Nimroud, many representations of the goddess, bearing in her hand a single serpent, had been discovered, but never before had she been found pictured with the mystic symbol that had been the problem of my life.

I stood before the dark face of rock, speechless in wonderment, for here, as Azala had predicted, I had actually made a discovery, amazing and bewildering. The mark that we both bore upon our breasts had for ages remained engraven there, a symbol of forgotten deity, a device, no doubt, held in reverence and awe by a civilisation now vanished.

That vast, weird cavern, filled with the monotonous roar of tumbling waters, inhabited by blind, unknown animals and reptiles, yet rendered almost fairylike by its wonderful stalactites, which glittered whenever a shaft of pale light caught them, was indeed peopled by ghosts of the past. By whose hand had those marvellous pictures been chiselled? By whose order had that tablet been prepared? The dark, gloomy place was, indeed, well named the Gate of the Land of the No Return. Was I not actually within the Rock of the Great Sin? What, I wondered, was the nature of the great sin to which the rock had remained a mute witness?