German traveller and writer Johann Schiltberger did not write anything about the cell, bars or violent death. Another contemporary, Jean II Le Maingre, who witnessed Bayezid's captivity, wrote nothing about the cell or poisoning as well. Clavijo, who came to Timur's court in 1404 as part of the embassy and visited Constantinople on his return trip, also did not mention the cell. All Greek sources of the first decade of the 15th century are equally silent about the cell. Sharafaddin Yazdi (? -1454) in "Zafar-nama" wrote that Bayezid was treated with respect, and at his request, Turco-Mongols found his son among the captives and brought him to his father. Regarding Bayezid's wife, Sharafaddin wrote that Timur sent her and his daughters to her husband. Olivera allegedly became a Muslim under the influence of Timur.