According to "The Realm of the Slavs" (1601) by Mavro Orbin, Stefan Radoslav served as ruler of Zachlumia during the reign of his father. However the sources Orbin used for his history of Zachlumia are not identified by name. They are considered lost and Orbin remains our earliest extant source for several of the events mentioned. According to it Miroslav, the Great was succeeded by his son Andrew (Andrija), only ten-years-old. Missing from the text is Toljen, a son of Miroslav who was mentioned as heir apparent in other sources. With Andrew being underage, the local nobility proceeded to depose him. They offered the crown to Peter (Petar), whose relation to his predecessors is not mentioned by Orbin. Fine notes that later scholars tend to assume Peter was another son of Miroslav and brother or half-brother to Andrew. Some time later, the cause of the exiled Andrew was taken up by Stefan Nemanjić who invated Zachlumia. Peter was forced to retreat to the areas west and north of the river Neretva. The rest of Zachlumia fell into the control of Nemanjić. Fine points that the areas supposedly held by Peter would not be uncontested. They are known from other sources to have been claimed by Andrew, Duke of Croatia and Dalmatia since 1198. Orbin next claims that Nemanjić divided Zachlumia between his cousin Andrew, son of Miroslav and his own son, Radolslav. Andrew was given control of Popovo and coastal Hum. The mainland was granted to Radoslav. Orbin then claims that Radoslav died and Nemanjić granted his area to Andrew. Fine points that Radoslav could not have predeceased his father. We know from other sources that he went on to succeed him. Nemanjić could have simply removed him for his position of authority for reasons lost to us. Orbin continues his account but Radoslav is not mentioned again.