Santa Fé New Mex.
13 May 1861

Colonel L. Thomas,
Adjutant General USA.,
Washington, D.C.

Sir:
I have the honor to tender my resignation, as Colonel of the Regiment of Mounted Riflemen in the Army of the United States, and request its acceptance,—.

With respect
I have the honor to be
Yr Off svt
W.W. Loring. —
Colo. Rifle Reg’t &
Bvt Colo. USA.