BTW one very important place that I think wiki got wrong in the reference to the place in or around WPG is the "White House". The WH I believe is the William Washington's house; same last name as the 1st president and is catty corner to the location of the phone! tinyurl.com/ux5svae
I like this for the "White House" as well (or the one next to it that has columns like the real White House).
Somewhere I did see a "solve" that used the Fort Sumter House on the west side of WPG as the "White House" along with the triangle off the string used to hang Fort Sumter on the branch in Image 2. They tried to say that triangle was the sliver of land between the SE corner of the Fort Sumter House and Murray Blvd. This would be across the street from the Hobson Monument in the SW corner of WPG.
To me that is private property and out of character with the known solves.
IMO the white points on the clock hands nails it down to be WPG. Looking towards the white house from the pay phone the view of the Villa is blocked by trees and the Washington's house; previously of Thomas Savage.
Maybe the reason the lion is in Image 2 is for its mane/Maine?! Love the wordplay! Also the black part of the lion's nose/mouth area looks somewhat like the capstan, don't you think? I'm with you on WPG being the right park. With the capstan in storage do we know exactly where it was located within WPG in the early 80s?
One of the best theories I've seen for Charleston was a couple months ago by a Reddit user who goes by the handle "slowrisingwhitebread". The theory was that basically "the bar that binds" is on a plaque on The Battery across the street from the south-east corner of WPG. The "long palm" would be the one on the Confederate Defenders of Charleston statue across the street.
I would expand on this further and suggest that "between two arms extended" would be between the drawn sword of the male figure and the outstretched arm of the female figure on the Confederate Defenders of Charleston statue. Both are "arms" (more word play) and if you are between them you are in a fairly small geographic area. The "bar that binds" as suggested above is actually on top of The Battery, so it is quite possible to be "below the bar that binds". If you line up the "I" shaped bar on the plaque with the middle of the two arms extended that gives you a very small spot to dig for the casque at the base of The Battery just below the plaque. This would be a similar technique to Chicago (fence and fixture)by lining up 2 objects in the verse.
The biggest issue is that a few years ago a large concrete planter was installed in this spot. I'd be curious to know if there is a concrete bottom in this planter (if so that would prevent digging for a casque). I'd also be curious to know if there was any sand in this spot back in the early 1980s? It looks like prior to the planter it was dirt and grass. Maybe the soil is very sandy below the grass?
This spot is also very close to where the Maine capstan once was and you can see a couple white houses from there. IMHO this spot has the most going for it as a potential burial site for the casque.
I think I figured out "the bar that binds"! In 1886 there was a massive earthquake in Charleston. Many of the structures around Charleston have these earthquake bolts through them to hold them together. On the outside of the structure all you see are these decorative gib plates, some of which look identical to the round markings on the wings of the fairy in Image 2!
Any idea what this wire line is about? May be letters? Looks like it starts at lower left with 'N'. Have you noticed the 3 vertical lines below the 'coin slot' have different thickness and length? There are two of them side by side. Old parking meters?
I like the parking meter theory, only public object that comes to mind that had 3 separate coin slots (pay phones had 3, but the slots were round…not slits). Also as you mentioned parking meters were generally paired. Not sure about the “wire line”, but it’s always bothered me. Are there letters along it? What is the object at the one end of it? Very asymmetric design to that object. Probably a good chance one or the other is the object we need to focus on and solve to locate the dig site.