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    Tinker, Mapper, Soldier, Spy – Captain Henry Elsdale’s Pioneering 1882–83 Experiment with Small Balloons and Vertical Aerial Photography in Halifax, Canada by Dirk Werle

    Published 2019-09-01
    “…They are attributed to an Englishman, Captain Henry Elsdale (1842–1900) of the Royal Engineers Corps. He experimented with a lightweight camera and a small, tethered balloon to successfully acquire a series of vertical aerial photographs of the Citadel Hill area of Halifax. …”
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