The politician Sir Henry Parnell (1776-1842) was instrumental in drafting legislation to improve the important road linking London with Holyhead in Anglesey, a major port for communication with Dublin. He was aided by the pioneering civil engineer Thomas Telford, and in 1833 Parnell published the first edition of this thorough work on road construction and maintenance. Reissued here is the second edition of 1838. Drawing on his experiences with Telford,...