William Pengelly was born at East Looe on January 12th, 1812, and was the son of the captain of a small coasting vessel and nephew of a notorious smuggler. The Pengellys had, in fact, been connected with the sea for several generations. His mother was a Prout of the same family as the famous water-colour artist.
As a child his career was almost cut short by fire. An aunt came to stay with the Pengellys, arriving a day before she was expected. Early on the following morning, when sitting in her bedroom window, wrapped in a thick woollen shawl, she saw her little nephew William rush out of the house enveloped in flames. She hurried after him, and managed to smother the fire with her woollen garment, and thus saved the child's life, though she was herself so badly burnt that she carried the scars to her dying day. The little boy had risen early, and had kindled a fire so that he might go on with his lessons before any one else was astir in the house, with the result that he set light to his clothes, and except for the premature arrival of his aunt, must certainly have been burnt to death.