SPOILERS - Answer 20

Spoilers Below

=======================================================================================================================================================================================================================================================================================================

Answer 20  is to guess grave #11 (coming from 25) based on: 

Using the text on reverse: " Between the ring and the sphere"

• The sphere is supposed to be relatively obvious, grave 17.
• I intentionally excluded ring shapes in the other designs, but now realize I might have to change the small circle around the star in #8
• The only circle is found back on the map.
• The space diagonally between them is #11.

Design Choices: The puzzles are getting tougher at this point (5 left if you count this one!), and this one calls back to something way, way back. 

Level of Success/Changes:  If it proves too hard, I could change 'ring' to 'circle'. It could eliminate thoughts of marriage. A player pointed out that  ring could also mean a bell! Great feedback!