NARA RG77 Z407. "Lines of Entrenchments for defence of Camps at City-Point, Virginia as laid out and constructed October 1864," Benham, dated Oct. 20, 1864. Map inset with sketched in defenses (red ink).

MOLLUS vol. 52, 2624. Map presented by Gen. Chas.Waite.

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• June 21, 1864, H.Q. Army of the Potomac
• June 30, 1864, Weitzel's Map of XVIII Corps Lines
• July 1864, Map of XVIII Corps Lines
• Native American Perspective of the Crater
• August 1864, Michler Map
• October 1864, IX Corps, Peebles and Pegrams Farms
• 1864, Coast Survey Map of the City of Petersburg
• Manuscript Survey, 1865
• Michler Map Series 1865-1867
• Michler-Weyss, Siege of Petersburg