This is a snippet I posted in a related question [Children born overseas to British Subjects — what is their citizenship status?][1]

![1911 Census Citizenship entry][2]

I've seen other codes on the 1911 Census forms in red and green ink.  What do the codes mean?

  [1]: https://genealogy.stackexchange.com/questions/6564/children-born-overseas-to-british-subjects-what-is-their-citizenship-status
  [2]: https://i.sstatic.net/eoNcD.png