UPDATE, 3:45 p.m.: As of around 3 p.m. this afternoon, the HCPC Facebook page had vanished. The North Central Texas Council of Governments Transportation Department confirmed that the page and the post were unrelated to any NCTCOG activity. And so the mystery remains, perhaps to be cleared up at the upcoming public meeting on the Blacklands Corridor in Greenville. That meeting will be March 20 at the Fletcher Warren Civic Center, located at 5501 S. Business Hwy. 69, beginning with an open house at 5:30 p.m.