الشكل 11 أ : - الصفحة الأولى من مقالة أبي نصر العين زربي Fig . 11 , a and b The introductory Page and the last of the Zahitiyah manuscriPt of Abu Nasr ibn Adnan ibn al - Ayn Zarbi - All Zahiriyah illustrations of figures used are courtesy of the Library through the assistance of the director and the library , s staff to all of whom I am very grateful .