Behemoth’s fame reached the wastes of Arabia, where men altered and magnified its image. From a hippopotamus or elephant they turned it into a fish afloat in a fathomless sea; on the fish they placed a bull, and on the bull a ruby moun- tain, and on the mountain an angel, and over the angel six hells, and over these hells the earth, and over the earth seven heavens. A Moslem tradition runs:

 

   God made the earth, but the earth had no base and so under the earth he made an angel. But the angel had no base and so under the angel’s feet he made a crag of ruby. But the crag had no base and so under the crag he made a bull endowed with four thousand eyes, ears, nostrils, mouths, tongues and feet. But the bull had no base and so under the bull he made a fish named Bahamut, and under the fish he put water, and under the water he put dark- ness, and beyond this men’s knowledge does not reach.

 

   Others have it that the earth has its foundation on the water; the water, on the crag; the crag, on the bull’s fore- head; the bull, on a bed of sand; the sand, on Bahamut; Baha- mut, on a stifling wind; the stifling wind on a mist. What lies under the mist is unknown.

 

   So immense and dazzling is Bahamut that the eyes of man cannot bear its sight. All the seas of the world, placed in one of the fish’s nostrils, would be like a mustard seed laid in the desert. In the 496th night of the Arabian Nights we are told that it was given to Isa (Jesus) to behold Bahamut and that, this mercy granted, Isa fell to the ground in a faint, and three days and their nights passed before he recovered his senses. The tale goes on that beneath the measureless fish is a sea; and beneath the sea, a chasm of air; and beneath the air, fire; and beneath the fire, a serpent named Falak in whose mouth are the six hells.

 

  The idea of the crag resting on the bull, and the bull on Bahamut, and Bahamut on anything else, seems to be an illustration of the cosmological proof of the existence of God. This proof argues that every cause requires a prior cause, and so, in order to avoid proceeding into infinity, a first cause is necessary. 

   Suggested or stimulated by reflections in mirrors and in water and by twins, the idea of the Double is common to many countries. It is likely that sentences such as A friend is another self by Pythagoras or the Platonic Know thyself were inspired by it. In Germany this Double is called Dop- pelgänger, which means ’double walker’. In Scotland there is the fetch, which comes to fetch a man to bring him to his death; there is also the Scottish word wraith for an apparition thought to be seen by a person in his exact image just before death. To meet oneself is, therefore, ominous. The tragic ballad ‘Ticonderoga’ by Robert Louis Stevenson tells of a legend on this theme. There is also the strange picture by Rossetti (‘How They Met Themselves’) in which two lovers come upon themselves in the dusky gloom of a wood. We may also cite examples from Hawthorne (‘Howe’s Masquerade’), Dostoyevsky, Alfred de Musset, James (‘The Jolly Corner’), Kleist, Chesterton (‘The Mirror of Madmen’), and Hearn (Some Chinese Ghosts).

 

   The ancient Egyptians believed that the Double, the ka, was a man’s exact counterpart, having his same walk and his same dress. Not only men, but gods and beasts, stones and trees, chairs and knives had their ka, which was in- visible except to certain priests who could see the Doubles of the gods and were granted by them a knowledge of things past and things to come.

 

   To the Jews the appearance of one’s Double was not an omen of imminent death. On the contrary, it was proof of having attained prophetic powers. This is how it is explained by Gershom Scholem. A legend recorded in the Talmud tells the story of a man who, in search of God, met himself.

 

   In the story ‘William Wilson’ by Poe, the Double is the hero’s conscience. He kills it and dies. In a similar way, Dorian Gray in Wilde’s novel stabs his portrait and meets his death. In Yeats’s poems the Double is our other side, our opposite, the one who complements us, the one we are not nor will ever become.

 

   Plutarch writes that the Greeks gave the name other self to a king’s ambassador.

  Pliny (VIII), relates that somewhere on the borders of Ethiopia, near the head of the Nile,

 

 

  Catoblepas, in Greek, means ‘that which looks downward’. The French naturalist Cuvier has conjectured that the gnu (contaminated by the basilisk and the gorgon) suggested the Catoblepas to the ancients. At the close of The Temptation of Saint Anthony, Flaubert describes it and has it speak in this way:

 

‘Obese, downhearted, wary, I do nothing but feel under my belly the warm mud. My head is so heavy that I cannot bear its weight. I wind it slowly around my body; with half-open jaws, I pull up with my tongue poisonous plants dampened by my breath. Once, I ate up my fore- legs unawares.

 

‘No one, Anthony, has ever seen my eyes; or else, those who have seen them have died. If I were to lift my eyelids- my pink and swollen eyelids - you would die on the spot.’