18 Proof the code is an acrostic depends on whose edition of Omar Khayyham’s quatrains you are looking at.
Imagine asking Australia’s foremost post-war decoding unit to determine if a code was an acrostic without providing them with the book it was written on.
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W R G O A B A B D
Meet Clarke Willis Walton (1885-1938), cotton goods manufacturer, small-time amateur printer and well-respected American publisher.
‘Walton published at least 15 small (17.5cmX12cm) numbered limited editions of the Rubaiyat.. For An Omarian Alphabet (cover pictured end of post) he selected 26 quatrains by 24 translators (2 each from Fitzgerald and Thompson) and associated each quatrain with a different letter of the alphabet. To each quatrain he added a caption of the form, A IS for Allah, the Lord of Omar or M IS for Morning, time for youth to rise.’
That’s generally the picture, and if we use Walton’s Omarian Alphabet on the first line of code – this is the result.
W is for wine, Omar well knows. Quatrain LV1
R is for Rose, like a Ruby rare. Quatrain 1X
G is for Garden, that lovely place. Quatrain 1X
O is for Oblivion, cheat it if you can. Quatrain XV1
A is for Allah, the Lord of Omar. Quatrain CLXX
B is for Bahram, a great old sport. Quatrain XX1
A is for Allah, the Lord of Omar. Quatrain CLXX
B is for Bahram, a great old sport. Quatrain XX1
D is for Dowry, love to the bride. Quatrain CLXLV111
Sounds like a semi-religious love chant .. Omar style.
Perhaps the Somerton Man carried a copy of one of these memorable, traceable, numbered rare editions with him, or perhaps one of Walton’s 15 editions of The Rubaiyat, but seeing the police didn’t release an image of the Freeman Rubaiyat, we’ll probably never know.
https://omarkhayyamrubaiyat.wordpress.com/2020/07/14/an-omarian-alphabet/
*An acrostic (verse) is a poem in which the first letter of each line spells out a word, message or the alphabet.
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fig:1
The Somerton Man 
Great find, very interesting. B = Bahrám is interpretet as “legendary king in the Shahnamah” (also Shahnameh) in my Dover Rubáiyát edition, a long Persian epic poem by Firdausi /Ferdowsi. However if you took it into account it just adds many more to already endless possibilities…