Bellas was an orphan at six years of age and brought up by his grandfather, whose fortune and name he acquired. While studying law at Göttingen, he befriended Samuel Taylor Coleridge and was inspired by Blumenbach with an interest in natural history which he pursued for the rest of his life. He studied mineralogy at Freiburg and made extensive geological tours on the Continent and, after his return home in 1801, of Cornwall and of Ireland (1806). He was secretary and founder of the Geological Society (1807).
His parliamentary career was only an unsatisfactory interlude. He was the guest of Mark Wood I for Gatton ‘recommended particularly by the Duke of Portland’, then prime minister.
Even while in Parliament, Greenough had made a geological tour of the country to map its strata. He wrote a classic book on geology (1819) and was for many years president of the Geological Society and a patron of other learned societies. He died at Naples, 2 Apr. 1855.
