A pair of copperplate engravings of the Moon by John Russell is expected to make £100,000-150,000 ($124,385-186,577) at Christie's.
Painter Russell drew the maps while looking through a telescope in 1805-1806. One shows the Moon in a flat light while the other includes some hypothetical shading.
Both are extraordinarily detailed and will be among the lead lots of a sale of historical books and manuscripts in London on December 1.
A globe featuring Russell's lunar observations sold for $242,500 at Bonhams New York in 2012.
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