That was the date on Zena Halpern's French Map. Oak Island was only one island then. Looks like Frog Island though was two separate islands. They buried treasure there too but it was recovered before the American Revolution.
I have today worked out where they took the Ark of the Covenant of God to but I do not know whether it was recovered and taken to Washington City. I believe that it was recovered. But anyway I have worked out where the Knight's Templar took it to and why.
This is a gag post right? Zena's scribblings are not a map by any stretch of the intellectual world's imagination. You have to go to very remote places of non-academia to find acceptance of her suggestions. I wouldn't use something that was generated to push one narrative to push another. At the very least one should probably respect her creative and imaginative talents while also pointing out she wasn't very good at writing French or blending in timelines.
The ark and the holy grail are both located at a spot that can never be reached by man in the mythical tradition where they originate. They properly reside in a place that is transcendent, in the middle of two fundamental dualities we can ponder at the very core of our being (represented by the inner temple and the 9th internal level of Enoch's chamber). The allegories written about the search for these things are not literal stories. That being said, people have been faking these relics for quite a long time to exploit dullards who have no sense of irony or allegory. The ark is, however, placed symbolically by some in the mythical Enoch's vault where it is located at the foot of the pillars of knowledge. The OI story/allegory does exploit this. The wisdom you seek is not to be found in the proving of literal truths. If you are not deep in the study of allegory with OI you are wasting your time. Haliburton likened it very closely to Bunyan's "Pilgrim's Progress" where the proverbial hero risks getting caught in the mud of the "slough of despond", a stinky swamp, or being swallowed alive in a shaft while mining for treasure at the "hill of lucre". If you want to get to the bottom of OI you will have to find your religion, I'm afraid. That is never about finding relics. The OI story is an allegory too. It has parts that we can recognize from religious stories. Ultimately that's what makes it a Masonic story.