What is evidenced by «عِنْدِي سَبْعُونَ أَلْفَ حَدِيثٍ»?

Narrator Criticism: Al-Mughīrah b. Saʿīd, Shaqīq and Jābir al-Juʿfī

• Authentication of all chains through Abū Jaʿfar
• An extant complete list attributed to Jābir
• Proof of individual hearing for each alleged text
• A transmitted claim by Jābir about his collection’s size