To this description of the strata was added, in the proper places, a list of the most remarkable fossils which had been gathered in the several layers of rock. The names of these fossils were principally supplied by Mr. Richardson, and are such as were then, and for a long time afterwards, familiarly employed in the many collections near Bath. Of the document thus jointly arranged each person present took a copy, under no stipulation as to the use which should be made of it, and accordingly it was extensively distributed, and remained for a long period the type and authority for the descriptions and order of superposition of the strata near Bath. Years rolled on, and Smith’s wanderings over England and their results were laid down by him on a map, which was to be published. With regard to this map of the strata, it may be said that it was very trying work for the publisher as well as the author. The basis of the map, as already explained, was in many respects peculiar; the colouring of it was more so. Instead of the _flat colouring_ ending in narrow defined edges usually employed for maps, Mr. Smith introduced a peculiar style of _full tints_ for the edges of the strata, _softened_ into the paler tint employed for the remainder of the area which they occupied on the surface. This new style of colouring gave a picturesque effect to the map, but required more than usual skill and patience to be correctly executed, and occasioned great trouble in examining the copies. The colouring of the map was thus rendered more expensive than had been anticipated, and notwithstanding the labour was well paid for, it was not always at first properly performed.