Clocks: a large carved stone gnomon, dated 1714, on Lord Reay's estate at Tongue. Lithograph after a drawing by C. G. Loch.

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Credit

Clocks: a large carved stone gnomon, dated 1714, on Lord Reay's estate at Tongue. Lithograph after a drawing by C. G. Loch. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.