sentences:  He was probably apprenticed to and then working for the architect and Denbighshire County Surveyor Thomas Penson between 1830 and 1843.After that he served with ecclesiastical architects in London, being employed, for instance, by Sir Joseph Paxton to oversee the building of the Crystal Palace.He became a prominent a member of Cymdeithas y Cymreigyddion in London, and its president in 1849.