"Eridhu, or Eri-duga, the Holy City, Nunki, or Nunpe, one of the oldest cities in the world, even in ancient Babylonia, was that kingdom's flourishing port on the Persian Gulf, but, by the enchroachments of the delta, its site is now one hundred miles inland. In its vicinity the Babylonias located their sacred Tree of Life."

The name Nunki is associated with 'water' as has been mentioned earlier (cfr at Sagittarius):

'... This [σ] has been identified with Nunki of the Euphratean Tablet of the Thirty Stars, the Star of the Proclamation of the Sea, this Sea being the quarter occupied by Aquarius, Capricornus, Delphinus, Pisces, and Pisces Australis. It is the same space in the sky that Aratos designated as Water ...

We here can understand why a delta is prior to land - it is not necessary to move in space further upland, it is only to sit down and wait for the developments of time. Why is modern man so preoccupied with travelling in space?

As to the odd name 'Egyptian X' (with Naos in its extremety in the southwest) we can find it defined under Allen's chapter for Canis Major:

"Perhaps it is the ancient importance of this Dog on the Nile that has given the popular name, the Egyptian X, to the figure formed by the stars Procyon and Betelgeuze, Naos and Phaet, with Sirius at the vertices of the two triangles and the centre of the letter."

Allen describes X as a composition of delta (at bottom) together with nabla (at the top). I prefer to see the Roman figure for five together with its inverted version at the bottom, 5 (fire) + inverted 5 (not fire) = 10 (X). I doubt X is a figure with triangles.

Once again we can perceive the quincunx and this time with Sirius in its center - which seems exactly as it should be, the stable center and the greatest star in the sky.

Wikipedia has no item for 'Egyptian X', but under 'Naos' I am delighted to find the origin of an important picture we have seen several times earlier (cfr at A Common Sign Language):

This is an ebony label from king Den's tomb in Abydos. He ruled for 42 years (around 3000 B.C.) and was the Pharaoh who introduced the method of numbering by hieroglyphs. His name Hor-Den possibly means 'he who brings the water'.

The dark circle above the king inside the sanctuary of the wolf-god Upwaut (the Opener of the Way) evidently is a hole. The Egyptian Naos is the inner sanctuary:

"In Egyptology, naos refers to that which is hidden and unknown inside the inner sanctum of a temple, but also to little boxlike shrines, carried by statues etc." (Wikipedia)

Hevelius seems to have known this, because he has put Naos at the corner of a design which at first can be interpreted as another shield (in addition to the curved one at ξ, Azmidiske) but which I think is a drawing alluding to a kind of naos = nave, a section inside a temple, church etc. Different types of church naves are illustrated below:

Pillars or columns is a characteristic feature of a nave.