Книга истории франков
The "Liber Historiae Francorum", a history of the Franks written in Neustria in 727, portrays the Austrasian Drogo as sympathetic to the Neustrians because of his marital connections. He did, however, fall foul of the abbey of Saint-Denis, which sued him in the king's court in a property dispute. King Childebert III ruled in Saint-Denis's favour. Drogo also lost a lawsuit over the villa of Noisy-sur-Oise with the monastery of Tussonval in 697.