Kirchhoff, who rediscovered Rankine's formula (Pogg.
Abandoned since 495 - for Kasyapa was eventually slain during a battle fought in the plain beneath - it has, on the whole, well withstood the fury of tropical storms, and is now used again to gain access to the top. When rediscovered by Major Forbes in 1835 the portions of the gallery where it had been exposed for so many centuries to the south-west monsoon, had been carried away.
The legend tells that the well was long covered up and rediscovered by `Abd al-Mottalib, the grandfather of the Prophet.
The famous well Zemzem at Mecca is said to belong to the early times, when the eastern traffic passed from the south to the north-west of Arabia through the Hejaz, and to have been rediscovered shortly before the time of Mahomet.
They were rediscovered in 1910 during the restoration of the abbey undertaken by the French government.