Baring-Gould’s sources: Authority: his life by Rudolf the monk, who died 1137. S. Adelelm is called also Elesmo or Elmo ; and is not to be confounded with another Adelelm or Elmo, who is only beatified.

S. Adelelm was a noble of Lyons in France, and served in the army, till God called him to a higher walk, then he renounced the world, and became a monk in the Abbey of Chaise-Dieu, after a visit to Rome. He was ordained priest by Ranco, Bishop of the Auvergne, but when he heard that the bishop had been suspended for having simonically obtained the see, he refused to execute the priestly office, till a successor was appointed. To see him, Adelelm started one stormy night. The way was dark, and the tempest raged with such fury that, but that it was necessary, he would not have started then. However, he took a candle, lighted it, and gave it to his comrade, and bade him lead the way. Notwithstanding the violence of the gale, the flame burnt steady, though not enclosed in a lantern, and illumined their road. From this, the electric lights seen at mastheads are called by sailors in the Mediterranean S. Elmo's lights. He was afterwards invited to Spain, and he was chosen abbot of his order in the monastery of Burgos, where he died.