I’m going to try to refine the location of the casque (where I think it is). There’s always a need to refine.
The verse
“Fortress north
Cold as glass
Friendship south
Take your task
To the number 982”
Those 6 lines are basically reinforcing your start point , ( the 982 ) and landmarks by the park( planetarium and friendship pavilion)
“Through the wood
No lion fears
In the sky the water veers
Small of scale
Step across”
Those 5 lines are telling you to head north. If your at the 982 the only way that your going to be able to step across the kiddie train tracks is by heading north, also that is the heavily wooded area in the park.
“Perspective should not be lost”
Let me rephrase that line. “ Perspective should be found”.
Now perspective can be seen everywhere but only one place in the painting. If you draw the lines of perspective in the painting you see that the vanishing point or END point lands close to the crest / top/ CORNER of the “Sand dune” . I think this line is eluding to the final resting spot of the casque , ( corner of the sand), much like the Boston verse line “feel at home”
“In the centre of 4 alike
Small split”
I think he is referring to the 4 metal posts that are by the drinking fountain and the 4 short posts in the painting. Three of the posts in the painting and in this location appear to be “ set in stone/ by concrete “
In the painting the central point between the 4 short posts in the background falls directly on that north / south line in the painting
If you are standing there in the park and looking northward you will see the 3 winged and slight.
“ Three winged and slight”
This is probably referring to the 3 pine trees that have had their lower branches trimmed off ( winged).
Looking at the Djinn headdress top, you see 3 black marks ( folds) that appear to be in the shape of pine tree needles.
“ What we take to be
Our strongest tower of delight
Falls gently in the December night”
Those line are in reference to the Herman Melville book “The Ambiguities “. Confirmation for Herman park and leaves that fall in the are of the casque.
He could be talking about the tallest of those three pines, being the strongest and this is a directional way point to look at
From the painting I’m going to assume that the strongest tower is the one with the rhino on the top. Since it has 2 leaves on the column like 2 hands.
“ Looking back from the treasure ground
There’s the spout
A whistle sounds”
Let me rephrase the first two lines. “ Looking forward from the spout is the treasure ground”.
If you have to look back from the treasure ground to see the spout ( drinking fountain) then the treasure ground is north of the fountain ( you were going north),in the sand, the perspective end point. The camels tail is black ( the end point), it’s north of the Djinn in the painting, ( the drink fountain ).
As well the kiddie train( the whistle) is south of the treasure ground.
GLTA
In the pic image on the right you see a green line that I placed , which is an extension of the camels tail and points to the “Lion shaped” drinking fountain and the post.