On the Vessel or Egg

Of the Philosophers: in which

Our Stone is to be placed,

so that by fire and art

it may be perfected.

Morienus A legendary 7th-century hermit and alchemist, famously the teacher of the Umayyad prince Khalid ibn Yazid. If the ancient sages had not discovered the [correct] size of the vessel in which our stone original: "lapis n̄r̄," an abbreviation for "lapis noster." was to be placed, they would never have arrived at the completion of this mastery magisterium | the "Great Work," or the entire process of creating the Philosopher's Stone.

Hence King Hali Khalid ibn Yazid (Rex Hali), an early historical figure in Islamic alchemy whose works were highly influential in the Latin West. says: Know the measure or the degree of the vessel of my work, because the Vessel is our root and beginning.