"On the 282 rolls of this microfilm publication are reproduced 584 bound volumes of telegrams sent and received mainly over the central telegraph in the Office of the Secretary of War from 1861 to 1882. These telegrams are a part of Record Group 107, Records of the Office of the Secretary of War." -- p. 1.

"On the 462 rolls of this microfilm publication are reproduced a collection of unbound telegrams sent mainly from one field command or installation to another or between the field and the War Department offices in Washington from 1860 to 1870. They are a part of Record Group 107, Records of the Office of the Secretary of War." -- P. 1.