Digging for Clay in the Archives of American Art, Smithsonian Institution - William Wyman
Letter from Wyman to British potter Bernard Leach (1887–1979), asking Leach if he could be “observer” in his shop September 12, 1961 (carbon copy). In a subsequent letter, Leach’s wife Janet (1918–1999) refused Wyman’s request to “hang around,” but suggested that he visit Leach Pottery for one day.

William Wyman to Bernard Leach, 1961 Sept. 12. Letter; typescript, carbon copy; 28 x 22 cm. William Wyman papers, 1930-1982. Archives of American Art.