Dirac independently rediscovered the purl stitch. https://books.google.com/books?id=Su-k9Kld5ooC&pg=PA232&lpg=PA232&dq=paul+dirac+purl+stitch&source=bl&ots=dOJ0

Dirac independently rediscovered the purl stitch. https://books.google.com/books?id=Su-k9Kld5ooC&pg=PA232&lpg=PA232&dq=paul+dirac+purl+stitch&source=bl&ots=dOJ0LRsoaR&sig=hc9ndZRxogoMhT1iEXttCK6Alpk&hl=en&sa=X&ved=2ahUKEwj03eS6-qbcAhUMUa0KHQnkDt8Q6AEwDHoECAMQAQ#v=onepage&q=paul%20dirac%20purl%20stitch&f=false https://books.google.com/books?id=Su-k9Kld5ooC&pg=PA232&lpg=...