I think I may have stumbled upon the answer thanks to your earlier picture showing two sets of twins.
The artist, Nicolas Poussin, was most likely a Rosicrucian and was well versed in classical history. Many of his painting were based on classical myths. Hew was also a contemporary of Francis Bacon, although much younger. I attach a link to a website that explores the esoteric side of Poussin (unfortunately some of the wording is not clear on my computer screen when reading it). Poussin Codes Part 1 - Gary Osborn
I have been researching the tale of 'Jason and the Argonauts' to look into Kore. Amongst Jason's crew were Hercules (or Heracles) a demi-god and the twins Castor and Pollux. The mother of these twins was Leto. If you look at the painting you will notice the similarity of the young men standing to the left and right of the bearded man. I think these two young men repsresent Castor and Pollux and the bearded man is either Jason or Hercules. The woman may well be Leto or possibly Kore.
When you join the painting using the vertical axis as you did, you get two sets of twins. What is the significance of this? Well the answer came from another post, which I set out below:
"What also occurs to me in the whole Leda story is that she gave birth to a double double - Helen and Clymnestria and also Castor and Pollux. Epsilon Lyrae is also connected to a double double, and is a double star system."
The stars Castor or Pollux are in the constellation of Lyre, which is the constellation in Rosicrucian geomancy that the bulk of North America lies under. This is what Wikipedia has to say about that constellation and Lyra in mythology:
Lyra (/ˈlaɪrə/; Latin for lyre, from Greek λύρα) is a small constellation. It is one of the 48 listed by the 2nd century astronomer Ptolemy, and is one of the modern 88 constellations recognized by the International Astronomical Union. Lyra was often represented on star maps as a vulture or an eagle carrying a lyre, and hence is sometimes referred to as Vultur Cadens or Aquila Cadens ("Falling Vulture" or "Falling Eagle"), respectively. Beginning at the north, Lyra is bordered by Draco, Hercules, Vulpecula, and Cygnus. Lyra is nearly overhead in temperate northern latitudes shortly after midnight at the start of summer. From the equator to about the 40th parallel south it is visible low in the northern sky during the same (thus winter) months.
Lyra is bordered by Vulpecula to the south, Hercules to the east, Draco to the north, and Cygnus to the west.
In Greek mythology, Lyra represents the lyre of Orpheus. Made by Hermes from a tortoise shell, given to Apollo as a bargain, it was said to be the first lyre ever produced. Orpheus's music was said to be so great that even inanimate objects such as trees, streams, and rocks could be charmed. Joining Jason and the Argonauts, his music was able to quell the voices of the dangerous Sirens, who sang tempting songs to the Argonauts.
At one point, Orpheus married Eurydice, a nymph. While fleeing from an attack by Aristaeus, she stepped on a snake that bit her, killing her. To reclaim her, Orpheus entered the Underworld, where the music from his lyre charmed Hades. Hades relented and let Orpheus bring Eurydice back, on the condition that he never once look back until outside. Unfortunately, near the very end, Orpheus faltered and looked back, causing Eurydice to be left in the Underworld forever. Orpheus spent the rest of his life strumming his lyre while wandering aimlessly through the land, rejecting all marriage offers from women.
There are two competing myths relating to the death of Orpheus. According to Eratosthenes, Orpheus failed to make a necessary sacrifice to Dionysus due to his regard for Apollo as the supreme deity instead. Dionysus then sent his followers to rip Orpheus apart. Ovid tells a rather different story, saying that women, in retribution for Orpheus's rejection of marriage offers, ganged up and threw stones and spears. At first, his music charmed them as well, but eventually their numbers and clamour overwhelmed his music and he was hit by the spears. Both myths then state that his lyre was placed in the sky by Zeus, and Orpheus' bones buried by the muses.
Vega and its surrounding stars are also treated as a constellation in other cultures. The area corresponding to Lyra was seen by the Arabs as a vulture or an eagle carrying a lyre, either enclosed in its wings, or in its beak. In Wales, Lyra is known as King Arthur's Harp (Talyn Arthur), and King David's harp. The Persian Hafiz called it the Lyre of Zurah. It has been called the Manger of the Infant Saviour, Praesepe Salvatoris. Of course, America's national symbol is the bald eagle and it is known as the land of the eagle just as Russia is symbolised by the Bear.
Thus, the painting could be a reference to the tale of Jason and the Argonauts, which also features Orpheus with his lyre, who famously descended into the underworld. This reference to Orpheus also makes me think of the Orphic Circle, another English front organisation for the Rosicrucians and the Hellfire Club that used to meet in underground caves like the Knights Templar.
You will note that the constellation Lyra borders both the constellations of Hercules (who may be featured in the painting) and Cygnus the Swan, which we have reason to believe is linked to Oak Island via Rosicrucian geomancy
If there is a map in the painting that is pointing to Nova Scotia and Oak Island then this hypothesis supports this.
I am going to post an alternative theory put forward by another Forum member in the 'Getting a Handl on things' thread in a follow-up post for comparison purposes.