If in fact it was coconut coir fiber (from the husk of the coconut) the fiber came from the Malabar Coast area of southwestern India, known as Kerala, India. If the fibers are determined to be date palm coir fiber, they could most likely be from the Judean Date Palm Tree which only grew in a few sections of the Levant: Jerricho, Jordan River Valley, and the Dead Sea (Israeli side). Since the fiber radiocarbon dated to 1229-1330 AD with 95% certainty (Crusade Period), if date palm fiber, then most likely brought by the Knights Templar or an affiliate group. If from India, it may also be brought by the Knights Templar or an affiliated group, but much harder to see a purpose and reason.

Thank you for posting. I believe the year is 1885?

What is curious is to know how much lower the sea level was in say 1400 AD, which is around when I believe the Money Pit was filled in. Or perhaps with a Francis Bacon bent, say 1500 AD. Perhaps someone could generate a graphic that would create island coastlines going back to 1600, 1500, 1400, Some of these mysterious object may be better understood when you see them at the different sea levels of the past.