October 21,1937. Flight out of Tucuman along Calchaqui Valley, over Salto, and return. Calchaqui valley: The plateau between the R. Pasaje and the Calchaqui Valley or Calchacui mountains. Looking NNE from 10 miles west of San Carlos. 16500 feet. 07:20.
Photographer's Note data comes from typed journals: 'Title List, Dr. and Mrs. Light's Central and South American Photographs, 1937. Part I Aerial Photographs made with the Fairchild F-8, 5 x 7 in. Roll Film Camera.'