The commonly received account of the martyrdom of St. Alban meets us as early as the pages of Bede’s “Ecclesiastical History” (Bk. I, chs. vii and xviii). According to this, St. Alban was a pagan living at Verulamium (now the town of St. Albans in Hertfordshire), when a persecution of the Christians broke out, and a certain cleric flying for his life took refuge in Alban’s house. Alban sheltered him, and after some days, moved by his example, himself received baptism. Later on, when the governor’s emissaries came to search the house, Alban disguised himself in the cloak of his guest and gave himself up in his place. He was dragged before the judge, scourged, and, when he would not deny his faith, condemned to death. On the way to the place of execution Alban arrested the waters of a river so that they crossed dry-shod, and he further caused a fountain of water to flow on the summit of the hill on which he was beheaded. His executioner was converted, and the man who replaced him, after striking the fatal blow, was punished with blindness.
(From Thurston, Herbert, St. Alban, The Catholic Encyclopedia, Vol. 1. New York: Robert Appleton Company, 1907.)