ready finished. In a small white phial
there still remained a little of the drug that had kept him awake and
active for four long nights. Each day, serene, explicit, patient as
ever, he had given his lecture to his students, and then had come back
at once to this momentous calculation. His face was grave, a little
drawn and hectic from his drugged activity. For some time he seemed lost
in thought. Then he went to the window, and the blind went up with a
click. Half way up the sky, over the clustering roofs, chimneys and
steeples of the city, hung the star.

He looked at it as one might look into the eyes of a brave enemy. "You
may kill me," he said after a silence. "But I can hold you--and all the
universe for that matter--in the grip of this little brain. I would not
change. Even now."

He looked at the little phial. "There will be no need of sleep again,"
he said. The next day at noon, punctual to the minute, he entered his
lecture theatre, put his hat on the end of the table as his habit was,
and carefully selected a large piece of chalk. It was a joke among his
students that he could not lecture without that piece of chalk to fumble
in his fingers, and once he had been stricken to impotence by their
hiding his supply. He came and looked under his grey eyebrows at the
rising tiers of young fresh faces, and spoke with his accustomed studied
commonness of phrasing. "Circumstances have arisen--circumstances beyond
my control," he said and paused, "which will debar me from completing
the course I had designed. It would seem, gentlemen, if I may put the
thing clearly and briefly, that--Man has lived in vain."

The students glanced at one another. Had they heard aright? Mad? Raised
eyebrows and grinning lips there were, but one or two faces remained
intent upon his calm grey-fringed face. "It will be interesting," he was
saying, "to devote this morning to an exposition, so far as I can make
it clear to you, of the calculations that have led me to this
conclusion. Let us assume--"

He turned towards the blackboard, meditating a diagram in the way that
was usual to him. "What was that about 'lived in vain?'" whispered one
student to another. "Listen," said the other, nodding towards the
lecturer.

And presently they began to understand.

That night the star rose later, for its proper eastward motion had
carried it some way across Leo towards Virgo, and its brightness was so
great that the sky became a luminous blue as