He cited Jean Baptiste LeChevalier "and others" as his sources for the idea, which his own observations seemed to him to confirm, although he pointed out what he considered unresolved problems.

These travels resulted in several publications, e.g. Geography and Antiquities of Ithaca and Itinerary of Greece, with a Commentary on Pausanias and Strabo.

He gave evidence in her favour on 6 October 1820, at her trial before the House of Lords,[6] stating that he had left her service merely on account of a fit of the gout and had seen no impropriety between her and her courtier Bergami.

He had another house in Naples, where he received visitors including his particular friends Sir William Drummond, the Hon.

His numerous drawings of classical ruins and localities, executed with great detail and exactness, are preserved in the British Museum.

Nonetheless his topographical works became recognised text-books at a time when Greece and even Italy were but superficially known to English travellers.

[6] His best-known work is Pompeiana; the Topography, Edifices and Ornaments of Pompeii, published between 1817 and 1832, in the first part of which he was assisted by J. P. Gandy.

He is, together with his friends Edward Dodwell and Keppel Richard Craven, by some modern scholars seen as the founder of the study of the historical topography of the hinterland of Rome.

[8] His works and notebooks proved very valuable for the topographical studies done by Thomas Ashby at the beginning of the 20th century.