Christopher D. Marshall spent one month in the Bishopric of Shubra al-Khayma, a suburb of Cairo, to gather information about Coptic Orthodox migration.  With him he brought a series of interview questions with which he hoped would uncover the methods of data collection used in the Shubra al-Khayma.  Bishop Marcos designated Father Youssef as Marshall's main point of contact, and in his interviews, Marshall was told of the many difficulties Coptic Christians face in such areas as church-building. He also learned of  the church's primary data collection method by which priests collect information from individual homes in their congregations.  Though he was pleased with the overall hospitality of the people and the church, the church was reluctant to reveal certain details to a foreigner about their data collection methods and thus he was left with many gaps in his research.