I'm right in saying that "ye olde" is not a real thing in any book. I've looked at the old type in books, and the printers used a character that was similar to a "Y" but was a different piece of type from the usual "Y" everywhere else. Perhaps some books may have used a "Y" on the same line as the other letters, but the ones I've seen used a raised letter for "th" that was different from the "Y" used in other words.

I wouldn't rely on Wikipedia above my direct observations.