Post Roads
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
The roads or highways, by land or sea, designated by law as the avenues over which the malls shall be transported.
Railway Mail Service Cases, 13 Ct Cl. 204.
A "post route," on the other hand, ls the appointed course or prescribed line of transportation of the mall.
U. S. v. Koch-ersperger, 26 Fed. Cas. 803; Blackham v. Gresham (C. C.) 16 Fed. 611.