[Publius6961]

which they wrote on bones, pieces of rock, parchment and papyrus. These, too, were later collected and used to complement Koranic authority.

Of course all 600 000 of these items vanished without a trace!
Actually, only 60 000 of these were culled and accepted as genuine 300 years after muhammed's death.
Then aliens arrived in flying saucers and took every bone, rock, parchment bark and papyrus.

Oh yes, those 45 scribes were such a pain when muhammed was running to save his butt, including dressing as a woman to avoid being caught and killed.

[Ridin' Shotgun]

they wrote on bones, pieces of rock, parchment and papyrus

And lets see, Moses wrote on 'tablets', right? Were those tablets those legal tablets you can buy at Office Max?