Gatun Upper blocks. View looking North, showing Progress of Construction of Upper Guard Gates in the East Chamber, August 5, 1911, Historic Print

Drawn from the Library of Congress archive, this print depicts Gatun Upper blocks. View looking North, showing Progress of Construction of Upper Guard Gates in the East Chamber, August 5, 1911. The Library holds one of the most comprehensive collections of American and international historical prints in the world.

Library of Congress record: Created 1911 August 5 Title and date from negative. 518-Y8. Gift; Harris & Ewing, Inc. 1955. General information about the Harris & Ewing Collection is available at Glass negatives.

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