"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.

"On the 20 rolls of this microfilm publication is reproduced an alphabetical card index to the telegrams collected by the Office of the Secretary of War (unbound), 1860-70, reproduced as Microcopy 504. The telegrams are part of Record Group 107, Records of the Office of the Secretary of War." -- P. 2.