Synopsis

  The casque associated with Image 4 and Verse 4 was buried in the Greek Cultural Garden in Cleveland, OH, somewhere in the near vicinity of these coordinates: 41°31'40.0"N  81°37'35.6"W.

To best understand the image matches and references as well as the verse interpretation used below, it is important to be familiar with those pages. Links can be found above.

The backwards/reverse and out of order hypothesis

There are several elements of this puzzle that appear to be backwards or reversed. In addition, other elements appear to be in a non-linear order. Examples include:

• The latitude/longitude clues of 1442 and 1881.
• To get the latitude the 14 must be reversed to become 41 in order to become a city bracketed by 41 and 42. But the same cannot get us a bracket from the number 1881.
• For one theory that gets us close to Cleveland, the 14 must be reversed to become part of 41.42. While the 18 must be both reversed and moved out of order to become part of 81.81.
• The lines of the verse do not appear to lead to the correct solution if taken in linear order. The first few lines appear to hint at the general area within the park. The ending lines of the verse home us in on the proper area/feature within the park. While the lines in the middle contain the most granular clues and give VERY specific instructions that lead to the exact burial site.

This appears to be very important for coming to the correct solution. Additional possible examples are included in the hypothesis solve that follows and discussed in more detail in the Solve Dissection discussion that follows the Detailed Solution.  

Detailed Solution

The solution given below will present clues from the verse and the image in a way that narrows down the search area to that specific point.  Bits of the original image are shown in the left column in cells with a tan background.  Lines from the verse are in the same column but with a yellow background.  (For more detail about any particular clue, check the page for the image or verse.)
Clues		Interpretations
		The shape to the left of the monument suggests that we should be looking in Ohio, possibly near a major highway.
		As discussed above these icons hint at latitude and longitude, but only of some numbers are reversed or possibly also moved out or order.   Reversing the 14 could give us a bracket of 41 & 42. The 1881 is a question mark using this technique.   Reversing the 14 and introducing a decimal could give us 41.42. Reversing the 18 AND moving it out of order could give us 81.81. This would get us close to Cleveland but not near the park that we know is correct.
		The sphere with the triangle on it shape is a reference to Euclid "The Father of Geometry." He was of course, also Greek.    Euclid Ave (Route 20) is a major Cleveland thoroughfare that runs from downtown through East Cleveland. It runs by the lower section of Rockefeller Park which is home to the Cultural Gardens.    That area also contains Bellflower Road and the last remnant of Liberty Blvd. (See below for more info)
		The icon of the bell and flower in close proximity may hint at Bellflower Road. However reading of lines usually flows down.   To make a Bell+Flower rebus from these icons, this would need to be another example of something that is backwards or reversed in this puzzle.    Bellflower Road is shown here in its entirely. Its length is entirely within the campus of Case Western Reserve University. There are many buildings of higher learning nearby plus a hospital, performing arts center and Science and Art museums.   With many of the arts and sciences flowing from the Greek tradition, if Preiss intended Bellflower Road to be a clue in the puzzle, this would be a likely reason why.
1) Beneath two countries		The casque was buried in the Grecian Cultural Garden, on the side facing the Italian Garden. "Beneath two countries" means when you are still on MLK Blvd., before you follow the curve in the road, you gaze up at the Greek and Italian Gardens high above you on the hillside.
2) As the road curves		Parkgate Avenue curves around this section of the gardens.
3) In a rectangular plot 4) Beneath the tenth stone 5) From right to left 6) Beneath the ninth row from the top 7) Of the wall including small bricks 8) Seven steps up you can hop 9) From the bottom level		These are explicit directions to follow up the hill to the back of the wall in the Grecian Garden, where there is a sunken planter at the location specified by the verse.
10) Socrates, Pindar, Apelles		These names, among those of many other luminaries of ancient Greece, are chiseled into the Pylon Monument.
11) Free Speech, couplet, birch		Refers, respectively, to Socrates (died for free speech), Pindar (a poet), and Apelles (a painter; "birch brush").
12) To find casque's destination 13) Seek the columns 14) For the search.		The entrance to the Grecian Garden is marked by two columns that appear in Image 4.
Final Location: 41°31'40.0"N  81°37'35.6"W (Latitude: 41.527774, Longitude: 81.626567)

Step by Step Directions:

1. From the image, use coordinates, 41 and 81 to identify Cleveland, Ohio.
2. From the image, use the silhouette of the Terminal Tower as a landmark.
3. Somehow discover the Cultural Gardens, located 6 miles north on Superior Avenue. 
4. Look at the map of the Cultural Gardens and notice a "road curves" from line 2 of the poem, which is Parkgate Avenue.
5. The Greek Cultural Gardens include features like the:
1. Pylon Monument - shown in the image and referenced on poem line 10
2. Columns - shown in the image and referenced on poem line 13
6. Follow poem lines 3 through 9 to reach the specific location of the planter box where the casque is buried.
7.