era (so called from Jalal-ud-din, one of the king's names)--'a
computation of time,' says Gibbon, 'which surpasses the Julian, and
approaches the accuracy of the Gregorian style.' He is also the
author of some astronomical tables, entitled 'Ziji-Malikshahi,' and
the French have lately republished and translated an Arabic Treatise
of his on Algebra.

"His Takhallus or poetical name (Khayyam) signifies a Tent-maker, and
he is said to have at one time exercised that trade, perhaps before
Nizam-ul-Mulk's generosity raised him to independence. Many Persian
poets similarly derive their names from their occupations; thus we
have Attar, 'a druggist,' Assar, 'an oil presser,' etc.<2> Omar
himself alludes to his name in the following whimsical lines:--

"'Khayyam, who stitched the tents of science,
Has fallen in grief's furnace and been suddenly burned;
The shears of Fate have cut the tent ropes of his life,
And the broker of Hope has sold him for nothing!'

<2>Though all these, like our Smiths, Archers, Millers, Fletchers,
etc., may simply retain the Surname of an hereditary calling.

"We have only one more anecdote to give of his Life, and that relates
to the close; it is told in the anonymous preface which is sometimes
prefixed to his poems; it has been printed in the Persian in the
Appendix to Hyde's Veterum Persarum Religio, p. 499; and D'Herbelot
alludes to it in his Bibliotheque, under Khiam.<3>--

"'It is written in the chronicles of the ancients that this King of
the Wise, Omar Khayyam, died at Naishapur in the year of the Hegira,