 A second mission sent in 1245 by Pope Innocent was led by the Dominican <unk> of Lombardia , who met with the Mongol commander <unk> near the Caspian Sea in 1247 . <unk> , who had plans to capture Baghdad , welcomed the possibility of an alliance and sent a message to Rome via his envoys <unk> and Serkis . They then returned a year later with Pope Innocent 's letter , <unk> <unk> <unk> , in which he appealed to the Mongols to " cease their menaces " . 
