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• 
  McCarthy Album 08, Photograph 179

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  Caption: "The Alameda of Presidio," c. 1906. View of a dirt or graveled drive, lined by cannonballs, leading to a small roundabout. The Alameda served as the principle gateway into the Presidio of San Francisco from the 1860s to 1895.

  Date: 1906

• 
  McCarthy Album 05, Photograph 198

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  Caption: "A 12" Disappearing Battery," c. 1915. View of a barbette equipped with a 12" disappearing gun. Retracting or disappearing guns were a form of artillery developed in the nineteenth century in which heavy artillery guns were placed on rotating carriages that allowed retraction of the weapon after firing, to enable reloading while under enemy fire.

  Date: 1915