I can't really get my head around Dee and Edward Kelly. It goes against all my logic to believe in any way that they communicated with "angels". I'm more inclined to believe that many parts of the tale are hoaxes by Kelly. But that cannot explain the enochian tables and the relationship thru codes to Shakespeare. It makes more sense if this is all part of a large project ran and planned over decades.
Some interesting leads-
Investigating further connections to Thomas Sackville Lord Buckhurst, I had a look for places named Sackville. The only towns in the world named Sackville are in New Brunswick and Nova Scotia (Just 34 miles from Oak Island). In Halifax there is the Sackville Masonic Lodge no. 137
Further connections in the Sackville family bring up some interesting possibilities. The first grand lodge of Italy was started by a Sackville a few generation later.
Even more interesting is George Germain Viscount Sackville. This is who those towns are supposedly named after.
Germain led the British forces during the American war of Independence. From what I can tell, this guy had a shocker and basically handed victory to the revolutionaries (who mostly happened to be freemasons). It seems likely that Sackville was a Mason. Could he have been working to sabotage the British? It would explain an awful lot.
The final episode of the most recent season of Oak Island had Cort Lindahl on, proposing that the booty had been removed to fund the US side of the war. Sackville seems like the best person to be able to pull this off, especially if his great great grandfather liked to write plays about mystical islands.