Remembering History: This is the oldest surviving Anglo-American star map, drawn by hand in 1780 by surveyor Simeon De Witt during the Revolutionary War. It includes a perpetual calendar for the years 1781 through 1826.

This is the oldest surviving Anglo-American star map, drawn by hand in 1780 by surveyor Simeon De Witt during the Revolutionary War. It includes a perpetual calendar for the years 1781 through 1826.

This is the oldest surviving Anglo-American star map, drawn by hand in 1780 by surveyor Simeon De Witt during the Revolutionary War. It includes a perpetual calendar for the years 1781 through 1826.