I emailed the National Archives about the nature of a quote from an HN comment ages ago. I spent a lot of time digging for sources and got stuck at a “box” somewhere in the Archives.
I emailed the Archives and was politely informed that I would need to visit in person to ascertain the exact document.
A few days later an Archives staffer emailed me under secrecy, saying they were not allowed to be doing this, but then provided exact details for what I needed.
It was truly an excellent internet moment for me. Sometimes the government is cool!