>>16730762
>>16738685
To continue with the borderline /x/ speculation, there are many accounts of "abductions," that could be considered "first contact" if proven true. In the modern day, most of these people are written off and told that they are psychotic, but most of them have this event happen to them only once, and most of them do not display any other delusions or hallucinations after.

What about pre-modern abductions?

The earliest possible abduction case I have found goes all the way back to March 1, 1639.

>The Muddy River UAP

It was chronicled by John Winthrop, the first governor of the Massachusetts Bay Colony. Winthrop wrote that earlier in the year James Everell, “a sober, discreet man,” and two others had been rowing a boat in the Muddy River, which flowed through swampland and emptied into a tidal basin in the Charles River, when they saw a great light in the night sky. “When it stood still, it flamed up, and was about three yards square,” the governor reported, “when it ran, it was contracted into the figure of a swine.”

Over the course of two to three hours, the boatmen said that the mysterious light “ran as swift as an arrow” darting back and forth between them and the village of Charlestown, a distance of approximately two miles. “Diverse other credible persons saw the same light, after, about the same place,” Winthrop added.

The governor wrote that when the strange apparition finally faded away, the three Puritans in the boat were stunned to find themselves one mile upstream—as if the light had transported them there.

An odd sight returned to the skies of Boston five years later, according to another entry in Winthrop’s diary dated January 18, 1644. “About midnight, three men, coming in a boat to Boston, saw two lights arise out of the water near the north point of the town cove, in form like a man, and went at a small distance to the town, and so to the south point, and there vanished away.”

>>40769262
Here is another good case:
>John Winthrop, the first governor of the Massachusetts Bay Colony
The Muddy River UFO account, one of the earliest recorded unidentified aerial sightings in the American colonies, dates back to March 1, 1639. It was chronicled by John Winthrop, the first governor of the Massachusetts Bay Colony, in his journal. According to Winthrop, a “sober, discreet man” named James Everell and two others were rowing a boat on the Muddy River (now in the area of modern-day Boston’s Back Bay or near the Charles River) late at night when they saw a strange light in the sky. This light was described as “a great light in the night” which “flamed up” and then “contracted into the figure of a swine.”

The object reportedly hovered and darted back and forth across the sky for two to three hours, moving swiftly “as swift as an arrow” between the village of Charlestown and the back of Boston Common, over what would be the Charles River estuary. When the object vanished, the men found themselves a mile upstream from where they had begun, with no recollection of having rowed that distance. Winthrop noted the strangeness of the event and the character of the witnesses, implying he found the report credible.

>>40746125
On March 1, 1639, John Winthrop opened his diary in which he recorded the trials and triumphs of his fellow Puritans as they made a new life in America. As the governor of the Massachusetts Bay Colony put pen to paper, he began to recount a most unusual event that had recently caused a stir among the English immigrants.

Winthrop wrote that earlier in the year James Everell, “a sober, discreet man,” and two others had been rowing a boat in the Muddy River, which flowed through swampland and emptied into a tidal basin in the Charles River, when they saw a great light in the night sky. “When it stood still, it flamed up, and was about three yards square,” the governor reported, “when it ran, it was contracted into the figure of a swine.”

Over the course of two to three hours, the boatmen said that the mysterious light “ran as swift as an arrow” darting back and forth between them and the village of Charlestown, a distance of approximately two miles. “Diverse other credible persons saw the same light, after, about the same place,” Winthrop added.

The governor wrote that when the strange apparition finally faded away, the three Puritans in the boat were stunned to find themselves one mile upstream—as if the light had transported them there.