The Most Probable Ones
There are two certain theories that have the strongest evidence to back them up. The first one goes that Marie Antoinette had a servant who buried her prized possession in the Nova Scotian island. It adds up because it is believed that she reached that area. On the other hand, French soldiers could have hidden their war trophies from the Seven Years War here.
Something Called The Harvard Theory
Barry Fell, a zoologist from Harvard, had a different theory about the island as well. After taking a look at the carvings, he reached a different conclusion from the rest. He thinks that they were made by Coptic Christians. Hailing from North Africa, they must have made their way to Nova Scotia many years ago.