A description of Westminster Bridge : to which are added, an account of the methods made use of in laying the foundations of its piers, and an answer to the chief objections, that have been made thereto : with an appendix, containing several particulars, relating to the said bridge or to the history of the building thereof, as also its geometrical plans and the elevation of one of the fronts as it is finished, correctly engraven on two large copper-plates /