Based on this research, in 1840 he presented to the Geological Society of London his paper "On the character of the beds of clay lying immediately below the coal-seams of South Wales, and on the occurrence of coal-boulders in the Pennant Grit of that district.
На основании своих исследований, в 1840 году представил Лондонскому геологическому обществу свою работу «On the character of the beds of clay lying immediately below the coal-seams of South Wales, and on the occurrence of coal-boulders in the Pennant Grit of that district».