Besides a tragedy, Sylla, the chief piece thus assigned is L'Occasion perdue recouverte, a rather loose tale in verse.
Their exact method is not certainly known, but it appears probable that they were acquainted with the process now called a cire perdue - the same as that employed by the great Italian artists in bronze.
The advantage of this process is that the artist's model is not destroyed as in the cire-perdue, and if a "waster" results, a second mould can be taken.
As early as the pyramid times solid casting by cire perdue was already used for figures: but the copper statues of Pepi and his son seem, by their thinness and the piecing together of the parts, to have been entirely hammered out.
By the time of the XIIth Dynasty, and perhaps earlier, cire perdue casting over an ash core became usual.