Click on the above image for a closer look. 

Blaze on Mullan Tree near 4th of July Summit. United States Idaho Fourth of July Summit, 1927. Photograph. https://www.loc.gov/item/2024687229/.  NOTE: the metal tag above the carving reads: "“Any person who shall wilfully destroy, deface, change or remove a Government Survey Corner or Monument; or to wilfully cut down any Witness Tree or Blazed Tree marking the line of a Government Survey, is punishable by a fine of $250.00 or Six Months Imprisonment or both.
(Sec. 57 Criminal Code of March 4, 1909.)”