Based on the clue 'a biographer said he was the first to build a wall...', what is the answer?

Based on the clue 'a bio of ms hewitt has this title like an erich se...', what is the answer? Based on the clue 'a bio of rosalind franklin whose photos were used ...', what is the answer? Based on the clue 'a bio of this producer of broadway shows like hell...', what is the answer? Based on the clue 'a biographer claimed he said i disapprove of what ...', what is the answer? What is associated with: a biographical dictionary first published in london in 1849? Based on the clue 'a biography of him is subtitled mans slave becomes...', what is the answer? Based on the clue 'a biography of the last child of camelot is titled...', what is the answer? Based on the clue 'a biography of this former cabinet secretary is su...', what is the answer?