In the segment titled "The Light of Experience", narrator Lord Clark discusses the great developments in Europe of the XVIIth century - mathematics, measurement, observation - and notes that these "were not hostile to architecture; nor to music, for this was the age of one of the greatest English composers, William Purcell." Here he is misquoting himself, for in the book that accompanies this series (Civilisation. New York and Evanston: Harper & Row, 1969, p.218) he correctly names the composer as Henry Purcell.
In the episode titled "The Pursuit of Happiness", series writer and narrator Lord Clark introduces his theme by claiming that "the founders of the American Constitution . . . thought fit to mention the pursuit of happiness as a proper aim for mankind." This is a very common error (on both sides of the Atlantic), as the phrase "pursuit of happiness" appears in America's Declaration of Independence (1776), not in her Constitution (1788-89).