#OTD in 1845, the Franklin Expedition set sail from Greenhithe, England, led by Royal Navy officer and explorer, Sir John Franklin.

In 1848, the British government offered £20,000 (£1.6 million today) to anyone who could help find Franklin's lost Arctic expedition

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Our files reveal some innovative suggestions for the recovery mission. One diagram shows a man being lifted by kites in order to view the surrounding area

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Another shows men surveying the ice below from a tethered hot air balloon #FranklinExpedition #OTD

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