Sorry, I’m having trouble following you, could you rephrase that?

Le mia scuse, lendor.

Yes. In your solution you have the letters that make up ‘HERCULES’ as well as ‘X’ and ‘Y’. These correspond to numbers using the A=0 system. The numbers are therefore tied to the letters and cannot be changed without changing the letters. 

This means that The Zodiac has no way, at this point, of intentionally adding any further information about the distance and direction of Hercules from Diablo into the numbers.

If you happen to find ’20’ and ’23 – 18 = 5′ among these numbers, then that can only be a coincidence.

I hope that is clearer for you, lendor. If not, let me know and I’ll try again.

Alright, let me see if I’ve understood this correctly.

When I reversed the “omega” sequence, I initially thought it was also meant to determine the position of the city of “Hercules.” At this point, however, I think it may simply be a coincidence that the combination of the two sequences associated with the Greek letters yields exactly the angle in radians (5), and that the number 20 from the half-filled rectangular sequence corresponds to 20—interpreted here as the distance in miles from Mt. Diablo.

I now believe that the “omega” sequence should only be reversed to derive the author’s name.

This sound good, lendor and, as you said before, seems to be much more robust as a proposal. 

If I understand you correctly, you now have a homophonic plaintext that gives the direction and distance, but only approximately. However, with this you also have a numeric solution giving the actual name of the place pointed to.

As well as both these things, you also include something to give the name of The Zodiac, but I haven’t looked at that in detail so I cannot give any comment.