Context

Context of Map of wagon routes in Utah Territory, explored & opened by Capt. J.H. Simpson topl. engrs. U.S.A., assisted by Lieuts. J.L.K. Smith and H.S. Putnam Topl. engr. U.S.A. and Mr. Henry Engelmann in 1858-59 ; by authority of Hon. John B. Floyd Sec. of War ; and under instructions from Bvt. Brig. Gen. A.S. Johnston U.S.A. Comdg. Dept. of Utah ; drawn by J.P. Mechlin
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