sentences:  Early negotiations resulted in the release of Mahmud Bey, who arrived at Edirne in early June 1444.Vladislaus' ambassador Stojka Gisdanić arrived soon after, along with, as required by a law signed by King Albert, Hunyadi's representative Vitislav, and two representatives for Branković.At the behest of Pope Eugene IV, the antiquarian Ciriaco Pizzicolli was also present to monitor the progress of the crusade plans.