Scope and content Collection includes copy of his birth certificate (he was born in Estonia, the son of a foreign correspondent for the Chicago Tribune); typescript reminiscences of his time as a bomber pilot during World War II; a memoir, published in "Photosynthesis Research," 1988; a summary article on "Research on photosynthetic reaction centers from 1932 to 1987," published in "Photosynthesis Research," 2002; article by others inscribed to Clayton; and copies of personal photographs and photographs of...