The online Lee Family Digital Archive contains the following letter.  Georgia legislatures should take heed and cover the carvings at Stone Mountain to start the healing and finally end the Civil War, kept alive by the refusal of so many to recognize the U. S. Constitution abolishing slavery and promoting equality for all men.

Lexington Va: 5 Aug 1869

Dear Sir:

Absence from Lexington has prevented my receiving until today your letter of the 26th Ulto: enclosing an invitation from the Gettysburg Battlefield Memorial Association, to attend a meeting of the officers engaged in that battle at Gettysburg, for the purpose of marking upon the ground by enduring memorials of granite the position & movements of the Armies on the field.

My engagements will not permit me to be present, & I believe if there I could not add anything material to the information existing on the subject. I think it wiser moreover not to keep open the sores of war, but to follow the examples of those nations who endeavored to obliterate the marks of civil strife & to commit to oblivion the feelings it engendered.

Very respy your obt Sevt
R E Lee