This is a word with considerable resonance by this point in the novel.
Victor has carefully kept Walton ignorant of the process by which he
created life, and, moreover, excoriates him when he suspects Walton of
wanting to penetrate his secret (Walton
1). He dies clearly wishing that he had himself remained in a state
of innocent ignorance. Although it is likely that, upon reflection,
Walton will broaden the range under which he construes knowledge to
embrace a moral education, here he limits its conception wholly to
scientific discovery. In his dejection he seems to have gone out of his
way to miss the point of Victor Frankenstein's narration, which is itself
truly a mark of his ignorance.