Did Columbus come to know that he was not in India when he reached the Caribbean? I find mixed answers online.

Columbus apparently thought he was in the East Indies of Asia.

http://www.rmg.co.uk/explore/sea-and-ships/facts/explorers-and-leaders/christopher-columbus

But did he ever come to know of the truth?

If he did, I don't think he left a historical record of it.

To determine whether Columbus knew that he was not in India when he reached the Caribbean, we can look at historical accounts and documents from that time period. It is important to note that different sources may provide varying perspectives, and the conclusion may not be definitive.

1. Christopher Columbus's Voyages: Columbus embarked on four separate voyages to the Americas between 1492 and 1504. His initial goal was to find a direct sea route to Asia (India) by sailing westward. However, after reaching the Caribbean islands, Columbus believed that he had indeed reached the East Indies in Asia. He referred to the indigenous people he encountered as "Indians."

2. Diario de a bordo (Ship's Log): The ship's log of Columbus, known as the "Diario de a bordo," described his journeys and provided some insight into his understanding of the lands he discovered. In these logs, Columbus mentioned various observations such as the differences in physical characteristics of the native populations, the landscape, flora, and fauna that were dissimilar to what he had expected in India.

3. Letters and Writings: Columbus also wrote several letters and reports during and after his voyages. In some of his letters, he expressed uncertainty about whether he had reached the Indies or an entirely new land. In others, he continued to refer to the Caribbean islands as the "islands of the Indies."

Considering these historical sources, it appears that Columbus had some suspicions that he had reached a different place than he intended, but he never fully realized that he had discovered an entirely unknown continent. He continued to believe that he had reached Asia until his death.

It's important to remember that the historical interpretation of Columbus's knowledge has evolved, and details may vary depending on different historical perspectives and sources.