The Silurian (System): From the Edinburgh Review

Siluria: The History of the Oldest Known Rocks Containing Organic Remains, with a Brief Sketch of the Distribution of Gold Over the Earth

The Silurian System: Founded On Geological Researches in the Counties of Salop, Hereford, Radnor, Montgomery, Caermarthen, Brecon, Pembroke, Monmouth, Gloucester, Worcester, and Stafford; With Descriptions of the Coal-Fields and Overlying Formations, Volu

On the Silurian System of Rocks

The Silurian System, Founded on Geological Researches in the Counties of Salop, Hereford, Radnor, Montgomery, Caermarthen, Brecon, Pembroke, Monmouth, Gloucester, Worcester, and Stafford: With Descriptions of the Coalfields and Overlying Formations; V. 1 (1839)

First Sketch of a New Geological Map of Scotland with Explanatory Notes

Address to the Royal Geographical Society of London: Delivered at the Anniversary Meeting on the 27th May, 1861. Preceded by Observations on Presenting the Royal Awards of the Year

“The” Silurian System Founded on Geological Researches in the Countries of Slop, Hereford, Radnor, Montgomery, Caermarthen, Brecon, Pembroke, Monmouth, Gloucester, Worcester, and Stafford: With the Descriptions of the Coal-fields and Overlying Formations