favourable circumstances, the State Church principle will not work. If two ride upon a horse, one must ride behind, and if Scottish Presbyterians have yet to learn that the State, having established a Church, will sooner or later thrust it into a position of subservience and slavery, they may be pronounced unteachable upon that subject. But it is was our intention to speak of Hugh Miller almost exclusively as a man of science, and we have lingered too long upon other phases of his history. His scientific talent was, we think, of a high order. It consisted mainly in an admirable faculty of observation, keen, clear, exact, comprehensive. He was habitually, and at all moments, an observer. Mr. James Robertson, a gentleman who knew him intimately and walked much with him in 1834, states, in some valuable recollections of Miller, contributed to Mr. Bayne's biography, that he, Mr. R., soon remarked how vividly alive he was to the appearances of nature, darting now at a pebble in the bed of a brook, now, at a plant by the wayside, never for one moment suspending his inquisition into the scene of wonders spread around him. Such being his habit of observation, two conditions only were required in order that he might become famous as a man of science, first that the district in which he pursued his researches had not been exhausted by previous explorers; secondly, that he possessed a literary faculty adequate to the communication of his knowledge. He was fortunate in both respects. The Cromarty district afforded extraordinary opportunities of observation in a department of the geological record until then but partially known. The Old Red Sandstone system had only begun to attract the attention of geologists. The Silurian system, below it, had been successfully explored; the Carboniferous system, above it, had been penetrated in all directions for its treasures of coal, and geologists had large acquaintance with its organisms; but the Old Red Sandstone had been comparatively overlooked. Miller found himself in the neighbourhood of good sections of the formation, and studied them with the utmost care and assiduity. His journeyings as a mason had made him familiar with the rocky framework of the north of Scotland, into which the Old Red Sandstone largely enters. He was able, therefore, on claiming recognition as a man of science, to tender a highly important contribution to the world's knowledge of one of the great geological systems. His name is imperishably inscribed among the original workers in the Old Red Sandstone, along with those of Sedgwick, Agassiz, and Murchison. His specific contribution was connected with the ichthyic organisms of the system, and no contribution could have been more important. The Old Red Sandstone system is distinguished, biologically, as that in which the vertebrate kingdom, in its lowest or fish division, was first prominently developed; and the most niggardly estimate of the achievement of Miller, as a geologist, must