Yes, I'm aware of Kerris Francis's book, centred on Every and Kidd, though I confess I haven't read it. That's not the case I'm making, I'm proposing that the original construction and deposition were medieval and Templar.
I understand the scepticism about Oak Island books generally. There have been a lot of promised solutions over the years with very little evidence to support their assertions and I'm not aware of any that have delivered on the solution promise.
Since a couple of people have picked up on the name, I should be straight about my position, for the work I referenced, Weststarbooks.com is the publisher and I'm the author. I believe the "solution" description holds up, but I'd rather people checked it than took my word for it, which is why the data files, the star tables and the code to reproduce them are published alongside the book.
I'm not here just to reference it. I'm genuinely interested in what objections people who know this story well would raise against the Templar case. Scepticism is the obvious one, and it was my own starting point.
I'm happy to discuss specific evidence and reasoning. What I'd rather not do is reproduce the whole solution here. One small example of the kind of thing I mean.
Take the 1347 date written longhand across the Halpern map. As far as I've been able to establish it has never been read as anything other than a date. I don't believe it is one. It's a sequence — 1, 3, 4, 7 — each term the sum of the two before it.
To a medieval reader trained in Christian Kabbalah that invokes a journey, a descent, from Kether as origin to Malkuth as destination, with two intermediate stages. For the intended recipient of the original map, who would recognise this straight away the origin is Talmont and destination is Oak Island, and the two middle terms are navigational insteuctions.
Both are on the map. The lionceau signals Leo and its principal star, Regulus. The fish at the other end of the signature block signals Piscis Austrinus and Fomalhaut. Put those with "les sud Indien travail tres bon" and you have a route: leave Talmont southward for the trade winds, run west under Regulus, turn north under Fomalhaut.
There's considerably more to the map, and the island annotations matter more than the navigation does but the point is that there's a specific argument here that can be examined and challenged, rather than another assertion.
I'm not expecting anyone to accept the conclusion on one example. Be sceptical — that's exactly why I'm interested in discussing it here. I'd only ask that it be judged on what it actually presents rather than on what other books have failed to deliver.