The final location is at N54 58.ABC W001 48.DEF , where the following can all be found on the panel which starts "Erected by":
A = the number of letters in the one word which makes up line 3.
B = the number of letters in the first word of line 6.
C = the second number displayed on the panel.
D = the sixth number displayed on the panel.
E = the number of letters in the first word of the quotation at the bottom.
F = the total number of letters in the first three words of the quotation.
Your checksum should be 40.
If anybody would like to expand to this series please do, I would just ask that you could let Just-us-Two know first at firstname.lastname@example.org so they can keep track of the memorial numbers and names to avoid any duplication.