Astaghfirullah! Who Put the Black Stone (Hajar al-Aswad) in the Toilet?

References:
1. Historical Perspective, by Alexander Knysh, page 213
2. Empire of the Mahdi by Heinz Halm
3. The Book of Government; or, Rules for Kings, by Niẓām al-Mulk
4. Al-Radd 'ala-I-Isma'iliyya by Ibn Rizam
5. Interactions in The Islamic World: The Ismaili Thread, edited by Orkhan Mir-Kasimov

This is the story about how Abu Tahir al-Qarmati attacked Mecca and stole the Black Stone from the Kaaba.