I wouldn't call adding 100 and swapping N for S and W for E 'exactly'! Also Pinaki is at Lat 19.23 not 19.16 (that would be Nukutava) and Long 138.40 - 6.15 = 132.25 (Cadiz 0) not 131.30! Not what I call exactly neither (60sm off) and off course it was only used after 1753 in Spain. I doubt that Anson would have used it six years after his expedition! In any case you almost always find some Prime Meridian for other ideas as well.
Wilkins has published a lot of treasure stories so mentioning Pinaki is nothing strange.
Pinaki has apart from a lagoon (with a very different form) and maybe turtles nothing in common with the island of the maps. You simply ignore the facts that don't fit your ideas!
Did he? Or did you decode it wrong? Like Numerology also the art of Cipher is something that can drive one nuts.
You can't know for sure you got the right cipher because the amount of encoded text is too small to give an unique result. The amount of valid ciphers is large and you picked the one that fits your idea. It is you not him who read coordinates in to them!
Don't get me wrong I do not mean to totally dismiss your idea but I can't see why it is better then all the others published before. Nothing you have written differs from the Oak Island or other ideas. They all have some way of decoding the maps the 'right' way.
Just add a little bit more Information on Pinacki.
The Englishman Samuel Wallis was the first recorded European to visit Pinaki Atoll on June 6, 1767, while searching for the "Southern Continent". Wallis named the atoll "Whitsunday". Frederick Beechey found Pinaki uninhabited in 1826, but he observed that there were huts on the island as well as small reservoirs for the collection and preservation of fresh water cut in the coral rock. The water is brackish and horrible to drink, but enough to survive on. Salt water permeates through the coral into the wells. Other than that, there is no fresh water on the atoll. other than water in green coconuts.
The island on its reef forms a broken ring almost enclosing a lagoon, which has a shallow tidal spillway facing west. Pinaki lies 14 km southeast of Nukutavake, which is the closest land. Vairaatea Atoll lies 51 km to the west of Pinaki. Pinaki Atoll measures 3 km in length, and its width is less than 2 km. It has a land area of 1.3 km2 and a lagoon area of 0.7 km2. Pinaki is uninhabited, but it is visited on occasion by villagers from neighboring Nukutavake. It is part of their commune.
Pinacki, there is no treasure. It has nothing to do with treasure other than Charles Edward Howe searching there on the mistaken belief that treasure was there. The owners of the atoll, the villagers of Nukutavake tolerated him there for about 7 years. Until he started digging up graves. And of course, the much-reported 1934 Hamilton expedition was based on Howe's lies. They soon abandoned the site for another atoll.
The northern side of the Atoll where the village is, with a few huts and a church, is where the locals go ashore; Trying to come ashore anywhere else on the atoll is suicide. Below is looking from the north.
Landing even in good weather is formidable. The coral heads are everywhere, and there is no real safe anchorage. You can see the coral barrier from an aerial shot below.
You always have to have a crew on the boats visiting anchored offshore.
This reality, even in calm weather, you do not have a soft sand beach to land on. Even with row boats of olden days, it was even harder. It was the only time you saw the locals tense, landing, and casting off from the atoll.
Getting onto these Atolls are a team effort. The locals from Nukutavake know where to land, as under white water about an inch under water is razor sharp coral that wrecks boats and cuts skin down to the bone. My arms and legs still bear the scars of a mis-timed landing.
There is no safe anchorage on the atoll. For 9 months of the year, wind, tide, and swell prevent a safe landing. Even in calm conditions, you surf the wave up onto the coral reef. Miss time catching the wave, you pay for it. The white water is the death zone you have get over.
Here is the church below. There are a few huts nearby on the northern side of the atoll.
The coral pass is only ankle deep, and in no way can you enter the lagoon in a boat. Deepest part knee deep.
Inside the lagoon, there are some coral islets above only very small.
On the coral islet, there is a rock with a circle, an upside-down L, and an arrow from memory. The alleged Spanish marks? However, a visitor to the island claimed Howe made the marks himself to gain support from backers.
The islanders of Nukutavake go there once or twice a year to cut copra. It is a community effort. they of course, stay on the atoll during copra cutting season. They fish in the lagoon. You have to be aware of Ciguatera fish poisoning, a form of food poisoning caused by eating warm water reef fish that carry ciguatoxin. The name is likely derived from the word "ciguatera"
The locals have a trick with the fish they catch in the lagoon. They place the fish near black ants. If the black ants refuse to eat fish, then it has Ciguatera. If the ants eat the fish, then it's okay to eat. The guys below are fishing at the entrance to the lagoon side. See how shallow the pass is.
So any claims that long boats full of treasure entered the lagoon are just pure flights of fantasy. Landing on the atoll is perilous to begin with. There were seven graves on the other side of the entrance. They were all female. French archaeologists dug them up and re-interred them below. That was the reason why Charles Howe was kicked off the island and eventually out of Polynesia.
The reality is that there never was any treasure on Pinacki connected to Anson or any other alleged treasure. The atoll being connected to a buried treasure of captain kidds charts is a flight of fantasy. Wilkins reported on the treasure story, alleged to be connected to the island by newspaper reports on how and later stories of Hamilton snowball. It created a sensation like any other treasure tale in the 1930s.
But it does not stop the odd visitor from daring to dream.
Crow