Radoslav had visited Ragusa in person that same year, and the treaty of friendship which was thus concluded is embodied in two documents. In the first the Ragusan commonwealth swears to the Župan Radoslav and his magnates that the city will be at peace with them according to ancient custom, and that they shall always have free access to its market. “And all this we wish to do and maintain to you and your people, without prejudice to our oaths to the Lord Doge and the commonwealth of Venice, and to the Lord Michael, Tsar of the Bulgarians.”[127] In the second document Radoslav promises to make war with all his strength against King Uroš, and to defend Ragusa by sea and land; he also added that he would remain at peace with Michael for so long as the latter’s treaty with Ragusa lasted.[128] The archbishop, who had been the original cause of all the trouble, had naturally become extremely unpopular, and when in his zeal for Venetian supremacy he proposed to carry out the provision of the treaty of 1232 by placing himself under the authority of the Patriarch of Grado, his position became untenable, and he was forced to abdicate (1257). The Ragusans obtained from the Pope that his successor should not be a Venetian. Another Venetian, however, was appointed in 1276. In 1266 the quarrel with Servia broke out afresh. The King was angry, according to Resti, because a number of his nobles quitted the country and settled at Ragusa. This statement, if true, is interesting, as it is the first immigration of Slaves on a large scale into the city after the early settlements between the seventh and the tenth centuries. But again the quarrel was settled by _stanico_, and the Ragusans agreed to pay Uroš the tribute of 2000 _ipperperi_ in exchange for increased privileges and the confirmation of their rights over the disputed territories at Breno, Gionchetto, &c.[129] The year 1272 is a very important one in Ragusan annals, as it is the date of the promulgation of the statute-book by the Count Marco Giustiniani. Hitherto the constitution and laws of Ragusa had been based on custom, altered and modified by statutes. Giustiniani codified all the existing sources of Ragusan jurisprudence into a corpus called the _Liber Statutorum_. Dalmatian law is based on a Roman substratum, with additions from local statutes, Slavonic customs, and certain commercial and maritime statutes. The contents of the new code are summed up in the following mnemonic distich:— “Elligit officia comes civitatis in _primo_, Officiis fides datur sacrata _secundo_, Causa litis sequitur _terno_ sub ordine libri, Conjugis inscripsit _quarto_ dotalia bona, Ordo datur domibus _quinto_ plateasque divisit, Judicis officium crimen exposit in _sexto_, _Septimo_ navigii additur, et mercium ordo, _Octavo_ in codice diversa colligit auctor.”