Recently I completed an initial foray into the underutilized 1848 census of Egypt that was commissioned by Muhammad ʿAli in the last years of his long rule. This enormous unpublished document provides a fascinating bird's-eye view of Cairo in the middle of the 19th century, permitting one to snoop into thousands of households, great and small, in Egypt's greatest and largest city to see a population undergoing profound social transformation. Here we find ordinary Egyptians, each identified by gender, age, nationality, civil status, occupation, religion, and relationship to the head of the household, living in houses, tenements, wakalas (caravansaries/residential hotels), mosques, and slums in a fantastic maze of streets, alleys, and byways. Here may be located various nationalities that contributed to the city's rich tapestry: Turks, Armenians, Syrians, Nubians, Sudanese, and Maghribis; Christians as well as Muslims and Jews; merchants and artisans; and soldiers, servants, and slaves.