Restoration drawings from 1937 by the Historic American Buildings Survey: U.S. Department of the Interior; National Park Service; Branch of Plans and Design. Measured on May 14, 1937, draw June 25, 1937—measurements checked by H.F. Whithey.

Cover sheet of Withey's restoration drawings from 1937. Click to enlarge.
Library of Congress Cover sheet of Withey's restoration drawings from 1937. Click to enlarge.
Site plan showing remaining buildings, adobe ruins, and foundation holes. Click to enlarge.
Library of Congress Site plan showing remaining buildings, adobe ruins, and foundation holes. Click to enlarge.
Barracks Building #2, remnants of the southern end. Click to enlarge.
Library of Congress Barracks Building #2, remnants of the southern end. Click to enlarge.
Barracks Building #2, remnants of the southern end. Click to enlarge.
Library of Congress Barracks Building #2, remnants of the southern end. Click to enlarge.
Officers’ Quarters, reimagined floor plan. Click to enlarge.Notes from the plans:"Fort Tejon general notes: These plans are made from measurements taken of the ruins as they stand at this time, May 1937, and from photographs taken years previous to a fire that about four years ago destroyed the roofs, floors, sash doors, and other combustible parts.Wall foundations are of rough cut stone laid in adobe mortar. Basement foundations are of the same stone but laid in lime mortar. Walls are of sun-dried adobe brick laid in adobe mortar and plaster on the inside of building with adobe mortar and a finish coat of lime. Adobe brick are approximately 3-1/2” x 7-1/2” x 15-1/2” and lay 3 courses in 14”. Ceilings were lime plastered of wood lath. Roof framing was of wood, shingle covered. Stone foundations partly exposed above the grade indicate that they were extensions on both east and west ends of building."
Library of Congress Officers’ Quarters, reimagined floor plan. Click to enlarge.

Notes from the plans:

"Fort Tejon general notes: These plans are made from measurements taken of the ruins as they stand at this time, May 1937, and from photographs taken years previous to a fire that about four years ago destroyed the roofs, floors, sash doors, and other combustible parts.

Wall foundations are of rough cut stone laid in adobe mortar. Basement foundations are of the same stone but laid in lime mortar. Walls are of sun-dried adobe brick laid in adobe mortar and plaster on the inside of building with adobe mortar and a finish coat of lime. Adobe brick are approximately 3-1/2” x 7-1/2” x 15-1/2” and lay 3 courses in 14”. Ceilings were lime plastered of wood lath. Roof framing was of wood, shingle covered. Stone foundations partly exposed above the grade indicate that they were extensions on both east and west ends of building."
Officers’ Quarters, reimagined elevations. Click to enlarge.
Library of Congress Officers’ Quarters, reimagined elevations. Click to enlarge.
Officers’ Quarters, reimagined elevations. Click to enlarge.
Library of Congress Officers’ Quarters, reimagined elevations. Click to enlarge.
Soldiers’ Quarters (now referred to as the “Orderlies’ Quarters”). Click to enlarge.
Library of Congress Soldiers’ Quarters (now referred to as the “Orderlies’ Quarters”). Click to enlarge.
Soldiers’ Quarters (now referred to as the “Orderlies’ Quarters”). Click to enlarge.
Library of Congress Soldiers’ Quarters (now referred to as the “Orderlies’ Quarters”). Click to enlarge.
The smoke house. Click to enlarge.
Library of Congress The smoke house. Click to enlarge.