Arcalian Chapter
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The Arcalian Chapter (occasionally known as Arcal) was the second-most important (after the Prydonian Chapter) of the six Time Lord Chapters or Colleges. [source needed] Arcalians wore green and brown robes. (TV: The Deadly Assassin)
The Arcalian Chapter was likely related to the Arcalian Council for Temporal Research. (PROSE: Spiral Scratch)