Who is Sarah Walters, mentioned on the website as having died the same day as Roberta Sparrow?

from Movie FAQ – Donnie Darko on Rap Genius

Meaning

It mentions she worked in the Library of Springfield until 1929.

This would not mean she had contact with The Philosophy of Time Travel as it was not published until 1944 according to Roberta Sparrow’s obituary. No specific relevance is mentioned.

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