In these objects, which were ever closely associated in his own mind, he was successful; the most valuable portions of his discoveries soon became public property, and he quickly acquired extensive employment in the practical applications of these discoveries to mineral surveying and draining of land on a large scale. The extensive diffusion of his fame and opinions, which now began, was owing to no actual and authorized publication, but to continual discussions and explorations with several active friends, oral communications and exhibitions of maps at agricultural meetings (then frequent), and circulation of manuscript copies of tabular expositions of the series of strata at that time determined. His views at this epoch appear by the following notice:— “During my five years’ close confinement to practical engineering on the Coal Canal, my much-wished-for opportunity of collecting observations enough from the ranges of the different strata to make an accurate delineation of the stratification throughout England were suspended. “I had seen enough by my tour of August, 1794, to satisfy myself of the practicability of doing it, and often wasted much time in poring over maps, in contriving how the ranging edges and planes of different strata could best be rendered intelligible: models were thought of, and one small map was cut along the edges of some of the strata with a view of defining their extent, and of showing how one stratum was successively covered by another. “I drew in colours, on a map of the vicinity of Bath, and on ‘Day and Masters’ county survey,’ all [that had been observed] very accurately to a certain extent, which embraced an interesting but intricate variety of strata in hills around Bath; and some small maps of England were spoiled by speculating on the ranges of stratification without sufficient data. The intricacies in their marginal edges were such that I found, to mark point by point, as the facts were ascertained, was the only way in which I could safely proceed. “My experience in what I had done upon the Somersetshire map was sufficient to convince me that to make a map of the strata on a scale as large as Cary’s England (five miles to an inch), with sufficient accuracy, much of it should first be drawn on a larger scale.”