Connecting Linkbetween twoSentences orParagraphs,
Miles, 1905 uses an arrow symbol with a hash on it to indicate a "connecting link between two Sentences or Paragraphs, etc."
It's certainly an early example of what we would now consider a hyperlink. It actively uses a "pointer" in it's incarnation.
Are there earlier examples of these sorts of idea links in the historical record? Surely there were circles and arrows on a contiguous page, but what about links from one place to separate places (possibly using page numbers?) Indexing methods from 11/12C certainly acted as explicit sorts of pointers.