A topographical chart of the entrance of the river Tagus, describing the coast from Cape Roca to Sacavem ; with the harbour and environs of Lisbon. The nautical part is from a survey taken in 1806 by W. Chapman, Master of the Royal Navy; and approved by the Chart Committee of the Admiralty. The interior and line of the coast are drawn from survays made by officers of the Quarter Master General's Department

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