Complex sentence: On Sunday, 14 February, the brothers and their partisans met, and on the next day they secretly left Constantinople and made for Adrianople, and then Tzouroulos, where they joined the army.
Split into simpler sentences: On Sunday, 14 February, the brothers and their partisans met. On the next day they secretly left Constantinople and made for Adrianople, and then Tzouroulos, where they joined the army.