John Tyndall, Faraday, Michael, Dictionary of National Biography, 1885–1900, ”At this time he had made the acquaintance and won the esteem, of Miss Sarah Barnard. Their friendship ripened into love, which, on his part, was accompanied by more than the usual oscillations of hope and fear. His passion so ardent, that she for a time doubted her ability to return it with adequate strength. His utterances at this crisis of his life were marked by the delicacy and considerateness which diffused themselves throughout his entire character. She at length yielded, and they were married on 12 June 1821.”.[källa från Wikidata]
