In his memoirs, Mark Twain joked that this non-American author was “in great measure responsible for the [Civil] war.” Edgar Ravenswood drowns in quicksand after his lover descends into insanity at her wedding in a novel by this author adapted into a Donizetti opera. In a novel by this author, Robin Hood besieges (10[1])Torquilstone but fails to rescue a Jewish nurse. This author anonymously published most of his novels as “by the author of Waverley,” including a novel where the Black Knight is revealed to be Richard the (-5[1])Lionheart. In (10[1])that novel by this author, Lady Rowena (10[1])marries the Saxon knight Wilfrid. (-5[1])For 10 points, name this Edinburgh-based author of Ivanhoe. (10[1])■END■ (10[3]0[3])