A rather extensive listing of historical sightings and some UFO resources. One example extracted and posted here.
Date of the Sighting: October 24, 1886
Location of the UFO Sighting: Maracaibo
Country of the Sighting: Venezuela
Description of the UFO Sighting: In a letter printed in the December 18, 1886 issue of Scientific American, page 389, the US consul of Venezuela in Maracaibo reported the sighting of a UFO. A bright object, accompanied with a humming noise, appeared during thunderstorm over a hut near Maracaibo. Afterward, the people in the hut displayed symptoms similar to radiation poisoning. Nine days later the trees surrounding the hut withered and died.