‘We, Stephen Tvartko Tvartkoević, King of Serbia, Bosnia, Primorie, Dalmatia, of the Western part of Lower Croatia, of Ussora, Sala, Podrinia, &c., with the consent of the realm, and according to the custom of the magnates of every grade, to the Prince John Mergnjavić, of Nissa, for the faithful services he rendered us in our need, when Murat (Amurath), the Turkish Czar, was wroth with us and wasted our dominions; for that then the said John Mergnjavić of Nissa went to the Porte, not sparing his own head for our sake, and found grace for us before the Czar, and rid our realm from his host: we, therefore, grant to him his own portion at Nissa, and Zvornik, and Nissava, and in the realm of Bosnia the country of Foinica,[226] and the land under Thum. And it is our will that this be not taken away from him for any breach of fealty which shall not first have been examined by the Bosnians and the Bosnian Church.’ As witnesses appear the Starosts (elders) of the kingdom, the Palatine with his brothers, the Župan Drina Driničić, the other palatines and Princes, and the Aulic marshal of the court. The whole is ‘written by the scribe Radoslav, Aulic of the great and glorious lord King Tvartko, in his residential seat of Sutiska, in the year 1426.’ To this was appended the great seal of King Tvartko, attached by red silk: on one side appeared the king seated on the throne of majesty crowned and sceptred; on the other as a knight on horseback, holding shield and lance. When in 1448 the great Hungarian general, John Hunyadi, defeated by Sultan Amurath on the ill-omened field of Kóssovo, was seized in his flight by George, Despot of Serbia, and imprisoned in the fortress of Semendria, he owed his deliverance to another scion of the race, George Mergnjavić, perpetual Count of Zvornik and lord of Foinica, who hurried to his relief with a strong body of troops collected from his territories; and a deed in which Hunyadi confirms this George in his possession bears witness to his gratitude. George Mergnjavić is succeeded by his nephew Tomko, who, besides being lord of Foinica, appears in the deed in which Hunyadi and Ladislaus, king of Hungary, confirm his titles, to be ‘Chief Voivode of the Kingdom of Bosnia.’ The last donation to the ‘Marcian’ family is from Mathias Corvinus, who in 1460, six years after the overthrow of the Bosnian kingdom by the Turks, confirms to Tomko Mergnjavić, Magnificent Count of Zvornik, lord of Foinica, and Starost of the kingdom of Rascia, his ‘mills, mines, vineyards, fishpools, and weirs’ (aquarum decursus), of which the Ban of Slavonia was attempting to deprive him.