Discusses Perceval and the Middle Welsh Peredur, which both contain an episode in which a Red Knight enters Arthur's court, seizes a goblet, and pours its wine on Guinivere. Whereas previous scholars have analysed this incident in the two narrations as if they were fundamentally identical, here specific dfferences in the two versions are examined in the light of traditions reflected in Old Irish and Middle Welsh textsDans IMB 30/1, janvier-juin 1996, n° 3148