2003 T. Pratchett Monstrous Regiment 308: His sergeant’s sash was the pure quill of redness.at pure quill (n.) under quill, n.1
2003 T. Pratchett Monstrous Regiment 73: ‘Who’s looking after the rupert?’ [...] The corporal sighed. ‘The officer. They ’re all called Rupert or Rodney or Tristram, or something’.at rupert, n.