Letters sent to the field offices carried the following designations:
| "B" |
Letters sent by the records "B" division, concerning
patents 1817-1908. |
| "C" |
Letters sent by Public Lands "C" Division, relating
to public disposal, 1796-1908. |
| "D" |
Records of Private Land Claims "D" Division, 1788-1909. |
| "F" |
Letters sent by the Railroad, Right of Way and Reclamation
"F" Division, concerning lands granted for railroad,
canals, and reservoirs, 1855-1909. |
| "G" |
Letters sent by the Pre-emption "G" Division, relating
to pre-emption and grants to states for schools, townsite, canals,
and other State selections, 1832-1908 |
| "H" |
Letters sent by the Homestead Contest "H" Division,
1887-1908. |
| "K" |
Letters sent byu the Indian and Swamp Land "K" Division
1849-1908 |
| "M" |
Records relating to accounting and financial matters of the
Accounting "M" Division, 1853-1908. |
| "N" |
Letters sent by the Mineral Contest "N" Division,
1844-1908. |
| "R" |
Records of the Forestry "R" Division, relating
to the use of military bounty land warrants and scrip on public
domain, 1788-1908. |
| "P" |
Letters Sent by the Commissioner of the General Land Office
ordering proceedings in contests. |
