1794  (1905)  May I request . . . a report of . . . the mode of blazing. . . .
1853  Blazing is a term used by the backwoodsman for chopping off a portion of the bark from each side of a tree to mark a surveyor's line through the woods.
1963  . . . blazing [of] narrow trails . . . was undertaken, as well as the putting up of some tiny patrol cabins.