11 ac It's a long novel about a passion for history (9) - - - - - - G - -
19 d Archer's enthralling book? Murdoch wrote it (3, 4) T - - / - - - -
20 d Nobleman to spoil legend of narrator (7) M - - - - - - I think this could be
MARQUIS mar for spoil but can't see where the quis comes in
Any help appreciated, thanks