I found while reading Tess of the D’urbevilles that she pondered on the date of the anniversary of her death, and wondered if this would be the exact day,
then years later, W.S. Merwin wrote a poem called On the Anniversary of my Death, same theme.
If you read The Portrait of Dorian Gray, there are correlations between Tom Riddle diary, and the portrait being stabbed to death in J. K. Rowling Harry Potter.
I guess Stairway to Heaven was a rip off of another band.