After traveling extensively in Britain, he settled in London in 1820 and was active in the British Association for the Advancement of Science. In 1827 he made the thirteenth recorded ascent of Mont Blanc, by a route never before used. He then traveled in Italy, Greece, and Asia Minor, making sketches of local scenery. In 1838 he explored the Xanthus River and discovered the ruins of Xanthus, the ancient capital of Lycia, and several other ancient cities of Lycia, including Tlos. The following year he returned to England and published A Journal Written during an Excursion in Asia Minor (1839), describing his discoveries. He made three more expeditions to Lycia, in 1839, 1841, and 1844, and discovered the ruins of thirteen more cities from which he sent many art objects and architectural remains to the British Museum in London. The remainder of his life was spent on the Isle of Wight, and he died in London on Nov. 8, 1860.