Smoke ring type cloud seen moving rapidly north

While east bound on US40 approx. 12 miles east of Terre Haute I saw a car parked in the west bound lane and the driver standing in the road.
It was a bright moon lit night and a cloudless sky. No noticable wind.
From a distance I could see the driver looking upward. I looked up out of the windshield and saw a cloud moving rapidly to the north.
I stopped some 1000 feet ahead of the other car, and got out and looked upward. The cloud was a circle like a smoke ring. It was moving quickly and stars could be seen through the circle. The cloud was dark below as if the cloud was very dense, and the edges seemed to curl upward as if wrapped around something.
It went from south to north smoothly and with no distortion as a cloud might have in a wind. My girl friend was yelling for us to leave.
Some years later I saw an article in a local paper with the other drivers story of the sighting.
Date is approximate.  We would like to have the article sent to us; we would like to post it.  PD