Eighteen of the nineteen cardinals assembled for the Conclave to elect his successor .
King Philip VI immediately sent his eldest son , Prince John , to press the candidacy of Pierre Roger , but he arrived too late to have any effect .
Eighteen of the nineteen cardinals assembled for the Conclave to elect Pierre Roger 's successor .
King Philip VI immediately sent his eldest son , Prince John , to press the candidacy of Pierre Roger , but he arrived too late to have any effect .