The night was warm, almost lusciously warm, and very still.  The sky was absolutely clear, but there was no moon, and the river, the flats, the two ranges of mountains that keep the Nile, were possessed by a gentle darkness.  As Isaacson stood there, he saw the lights on the Fatma gleaming, he heard the sad and tempestuous singing of his men, and the barking of dogs on hidden houses keeping guard against imagined intruders.  When he looked at the lights of the Fatma, he realized how the boat stood to him for home.  He felt almost desolate in leaving her to adventure forth in the night.

But he turned southwards and looked up-river.  Far away—­so it seemed, now the night was come—­isolated in the darkness, was a pattern of lights.  And high above them, apparently hung in air, there was a blue jewel.  Isaacson knew it for a lamp fixed against the mast of the Loulia.  He put his hand down to his hip-pocket.  Yes, his revolver was safely there.  He lit a cigar, then, moved by an after-thought, threw it away.  Its tip hissed as it struck the river.  He looked at that blue jewel, at the diaper of yellow below it, and he set out upon his nocturnal journey.

At first he walked very slowly and cautiously.  But soon his eyes, which were exceptionally strong-sighted, became accustomed to the gloom, and he could see his way without difficulty.  Now and then he looked back, rather as a man going into a tunnel on foot may look back to the orifice which shows the light of day.  He looked back to his home.  And each time it seemed to have receded from him.  And at last he felt he was homeless.  Then he looked back no more, but always forward to the pattern of light that marked where the Loulia lay.  And then—­why was that?—­he felt more homeless still.  Perhaps he was possessed by the consciousness of moving towards an enemy.  Men feel very differently in darkness and in light.  And in darkness their thought of an individual sometimes assumes strange contours.  Now Isaacson’s imagination awoke, and led his mind down paths that were dim and eerie.  The blue jewel that hung in air seemed like the cruel eye of a beautiful woman that was watching him as he walked.  He felt as if Bella Donna had mounted upon a tower to spy out his progress in the night.  With this fancy he played a sort of horrible game, until deep in his mind a conviction grew that Mrs. Armine had actually somehow divined his approach.  How?  Women have the strangest intuitions.  They know things that—­to speak by the card—­they cannot know.

Surely Bella Donna was upon her tower.

He stopped at the edge of a field of doura.  What was the use of going further?

He looked to the north, then turned and looked to the south, comparing the two distances that lay between him and his own boat, between him and the Loulia.  His mind had said, “If I’m nearer to the Fatma I’ll go back; if I’m nearer to the Loulia I’ll go on.”  His eyes, keenly judging the distances, told him he was nearer to the Loulia than to his own boat.  The die was cast.  He went on.