Besides Dante many other Whites had been expelled from Florence.[91] Whether they liked it or not, they were forced to seek aid from the Ghibelines of Arezzo and Romagna. This led naturally to a change of political views, and though at the time of their banishment all of them were Guelfs in various degrees, as months and years went on they developed into Ghibelines, more or less declared. Dissensions, too, would be bred among them out of recriminations touching the past, and charges of deserting the general interest for the sake of securing private advantage in the way of making peace with the Republic. For a time, however, the common desire of gaining a return to Florence held them together. Of the Council constituted to bring this about, Dante was a member. Once only with his associates does he appear to have come the length of formal negotiations with a view to getting back. Charles of Valois had passed away from the temporary scene of his extortions and treachery, upon the futile quest of a crown. Boniface, ere being persecuted to death by his old ally, Philip of France (1303), had vainly attempted to check the cruelty of the Blacks; and Benedict, his successor, sent the Cardinal of Ostia to Florence with powers to reconcile the two parties. Dante is usually credited with the composition of the letter in which Vieri dei Cerchi and his fellow-exiles answered the call of the Cardinal to discuss the conditions of their return home. All that had been done by the banished party, said the letter, had been done for the public good.[92] The negotiations came to nothing; nor were the exiles more fortunate in arms. Along with their allies they did once succeed by a sudden dash in penetrating to the market-place, and Florence lay within their grasp when, seized with panic, they turned and fled from the city, which many of them were never to see again.