LA Pampa, Arg being encounter — May 15, 1950

On the afternoon of May 15, 1950, architect Enrico Carotenuto Bossa was driving alone across La Pampa during a business journey from Bahía Blanca. He had covered roughly 280 kilometres when a silvery object on the ground, several hundred metres to the left of the road, caught his attention. At first he wondered whether it was wreckage from an aircraft. As he came closer, the polished shape and unfamiliar construction made that explanation seem less likely. Bossa stopped his car and approached on foot. The object was about ten metres across and leaned at an angle against a rise in the terrain. Its lower half resembled an inverted saucer; above it stood a cylindrical section, translucent cupola and round lantern-like structure. Rounded rectangular portholes circled the hull. The chromium-coloured surface reflected Bossa and the passing clouds, but the lower rim appeared damaged and irregular. There was no sound, vibration or visible activity. A small hatch at the base stood open. Bossa crouched and climbed through it into a dim circular cabin. He recalled a strong smell combining ozone and garlic and an atmosphere that felt heavy and difficult to breathe. The slightly yielding floor, thick clear portholes, orange-white ceiling light and circular wall made the compartment feel engineered but unlike an ordinary aircraft. At the centre sat a short humanlike occupant in a vermilion-red chair fixed to a central post. The figure was between 1.2 and 1.4 metres tall, normally proportioned rather than dwarflike, with tobacco-brown skin, sparse light hair, a straight nose and large glassy eyes. A lead-grey coverall fitted tightly at the neck and wrists and bulged at the shoulders. Its hands gripped two handles attached to a black control box, but the body was rigid, cold and apparently lifeless. Two almost identical figures lay motionless on separate divans against the cabin wall. A fourth divan was empty. Bossa examined radio-like green indicators, a horizontal scale with unfamiliar signs, a dark screen and a transparent sphere encircled by an angled ring like Saturn. The unoccupied couch and open door made him fear that another crew member might be outside. Panic finally overcame his curiosity, and he left the craft. Back in the open air, Bossa felt dizzy. His car starter reportedly turned sluggishly before the engine caught. At General Acha he told friends what he had seen and persuaded them to return with him. A violent thunderstorm had crossed the area. The craft was gone, and the party instead found a large mound of warm silvery-red ash or residue at the reported location. The site was not secured, and the material's later custody and analysis are not established in the public record. Bossa and his companions then reported seeing a similar disc overhead, with another object above it and a stationary cigar-shaped body higher still. Bossa reportedly took a photograph as the smaller objects rose toward the cigar and disappeared. The provenance, surviving generation and evidentiary value of that photograph require careful archival review before it can be displayed as authenticated case evidence. The account reached later catalogues through Leonard Stringfield, José Escobar Faria and other writers. Its remarkable mechanical detail makes it unusually visual, but it also demands caution: the interior sequence had one witness; the chain between the event and later published versions is complex; and no verified craft, occupant or residue survives for independent examination. The Atlas records the story without converting its specificity into certainty. The apparent deaths or incapacitation of the figures are Bossa's interpretation of what he saw, not medically established facts. The ash and photograph remain reported evidence requiring a reliable custody and provenance chain. CE4 is retained from the source classification because Bossa reported entering the object. The narrative describes voluntary entry into an apparently disabled craft, not an abduction by its occupants. The portrait reconstructs the cabin at the moment Bossa looked inside: one short motionless occupant gripping the central controls, two on side divans, one empty couch, the open damaged hatch and the Saturn-like instrument. It deliberately avoids generic grey aliens and gore. It is an illustrative reconstruction based on the stored description, not a photograph of a recovered vehicle.