TY  - GEN
AU  - Frost,Edward
ED  - United States.
TI  - United States. Army. Office of the Chief of Engineers letterpress book,
KW  - Fortification
KW  - Washington (D.C.)
KW  - Potomac River Valley
KW  - History
KW  - Civil War, 1861-1865
KW  - United States
N1  - Open to research
N2  - Letterpress book containing copies of letters (1862 May 9-1865 June 8) sent by Edward Frost and other engineers, Office of Engineers, responsible for defenses of Washington, D.C., south of the Potomac River
ER  -