The United States Census of 1860 was the eighth Census conducted in the United and it captured a more refined picture of the United State's population of 31,443,321...that included in the official enumeration the names of 49-year-old Edward Dickinson Baker, and his household as officially recognized residents of the South Salem Precinct, in Oregon.

According to the official U.S. Census website, "the Eighth Census of the United States was authorized by the previous census May 23, 1850 act. On the recommendation of the Secretary of the Interior, the provisions of this act were to be adhered to, following the requirement for the taking of the eighth, or any subsequent census under its provisions, if no law, therefore, was passed before January 1 of the year in which the census was required."
- -Carrol D. Wright and William C. Hunt, The History and Growth of of the United States Census. Government Printing Office: Washington, Washington, DC, 1900. p.50.

So it was on the second day of August, 1860, that Assistant Marshall D.B.Hannah, one of Oregon's official ennumerators; dutifully recorded Edward Dickinson Baker, his wife, Mary and son Edward Dickinson Baker, Jr, on the preprinted census sheets that would find their way back to Washngton D.C., and eventually become part of the United States' official Eighth Census.

It was a special, pre-war census whose statistics gave the staff at the Census Bureau the ability to construct maps of the country at that time. The cartographers were able to focus on making maps of Southern states with vital statistics (like railroad and transportation concentrations, and slave populations) that future Union generals and military leaders like Colonel Edward Dickinson Baker, himself, would use in planning military strategies and campaigns.