Original projection parameeters for USGS National Atlas feature classes hydro_ln_2mm, hydro_pl_2mm, cities_2mm, plss_2mm, and usa_2mm as downloaded from National Atlas web site:

Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Geographic:
      Latitude_Resolution: 0.000278
      Longitude_Resolution: 0.000278
      Geographic_Coordinate_Units: Decimal degrees
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1983
      Ellipsoid_Name: GRS1980
      Semi-major_Axis: 6378137
      Denominator_of_Flattening_Ratio: 298.257222

      
==============================================================================

Using ArcMap projection tools, M.Martischang projected each feature class to:

Projected Coordinate System:	USA_Contiguous_Lambert_Conformal_Conic
Projection:	Lambert_Conformal_Conic
False_Easting:	0.00000000
False_Northing:	0.00000000
Central_Meridian:	-96.00000000
Standard_Parallel_1:	33.00000000
Standard_Parallel_2:	45.00000000
Latitude_Of_Origin:	39.00000000
Linear Unit: 	Meter

All Charles C. Royce Cessions maps were georeferenced (1st order affine) to this USA_Contiguous_Lambert_Conformal_Conic projection.