How did CommonWealth Magazine reporter Colman Herman’s words end up in former state inspector general Greg Sullivan’s mouth when Sullivan was quoted in the Boston Herald? It’s a great question, and John Carroll asks it at his blog It’s Good to Live in a Two-Daily Town.

Here’s what happened. As Carroll noted Friday, both The Boston Globe and the Herald ran stories about a sweetheart deal the Red Sox have had with the city since the 1940s after Herman reported the previous day that there seemed to be no legal basis for it. Boston Mayor Marty Walsh is said to be investigating. The Globe credited CommonWealth; the Herald didn’t.

But what is stranger still is that the Herald story, by Richard Weir, quotes Sullivan as saying something that Herman wrote, word for word: “No other single private entity is allowed to close off a street in Boston on a regular basis.” Carroll adds he has it on “good authority” that Sullivan contends he never said it.

Perhaps it’s also worth pointing out that CommonWealth and the Herald have a poisonous relationship. For reasons that were never clear, a couple of years ago the Herald went after CommonWealth’s publisher, the Massachusetts Institute for a New Commonwealth, a nonprofit think tank. Here is an example. (Note: I used to write a media column for CommonWealth and remain a friend of MassINC.)

It’s hard to know what to make of the latest weirdness without hearing from Sullivan and the Herald. Now that Carroll has documented it, I hope the principals will weigh in.

Update: A couple of people reminded me of this CommonWealth story, which challenged the Legend of Gidget, one of the foundations on which the modern Herald was built. So maybe that’s where the animus began.