Alexander McNeill
From Kook Science
Alexander McNeill was an American who reported sighting an egg-shaped flying craft near Oceanside, Long Island, New York during the evening of 27 August 1952. Per McNeill's account, the object was said to have given off a very putrid odour, causing him to move away, and he observed three entities aboard, which he estimated to be 3 feet (91.44 cm) in height, all three having large heads, pointed ears, and wearing tight green overalls and blue caps. McNeill further stated that he had signalled to the craft using a flashlight, and it had responded with three flashes in return, after which it departed.
Selected Bibliography
McNeill presented on his encounter at the 1967 Congress of Scientific Ufologists in New York in a brief talk that was transcribed by Bessie J. Gibbs, https://archive.org/details/1967_Congress_of_Scientific_UFOlogists/page/n105/mode/2up