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Transit Instruments at the Cape Observatory, 1857. Creator: Hare.
HRM23A76_337

Transit Instruments at the Cape Observatory, 1857....

Ruins of the Great Fire at Gravesend - looking West, 1850. Creator: Unknown.
HRM22A33_429

Ruins of the Great Fire at Gravesend - looking Wes...

Elevation of Troughton's dividing engine, 18th century, (1886). Artist: Unknown
HRM19C36_155

Elevation of Troughton's dividing engine, 18th cen...