In regard to geological formation it need only be remarked that the Berkshire valleys are almost wholly composed of limestone, and the supply for architectural and agricultural purposes being practically unlimited, will prove a source of great wealth to that region for many years to come. The hills, however, are all composed of quartz, gneiss, talcose slate, or mica slate.

We will now visit the valley of the Connecticut, where is to be found some of the boldest, and by all odds the most beautiful scenery in Massachusetts. The broad and fertile plains through which the river gently flows are, in themselves, charming, but when we add to them the bordering hills, the scene is one of surpassing loveliness.

Between Hadley and Easthampton, the river runs through a gorge in a greenstone ridge nearly one thousand feet high. The portion of the ridge east of the river is called Mount Holyoke, and the portion west of it Mount Tom. This gorge is very interesting because of showing the amount of erosion that can be performed by water in long periods of time. In all probability the bed of the Connecticut was, in remote time, much higher than it is at present, and the river itself much larger, and the rich, alluvial plains that border it at the present day were once beneath its broad waters.

At one point in the gorge a mass of greenstone projects some rods into the river from the west side of Holyoke, having a perpendicular face twenty to one hundred feet high. This mass exhibits a columnar structure similar to that of the Giant's Causeway. The structure is not very evident above the level of the river, but at low water, by rowing along the face of this rock one can find the tops of regular columns reaching nearly to the water's surface. On the opposite side of Holyoke, not far from the road going to the summit, is another interesting example of these greenstone columns. Professor Hitchcock named these respectively Titan's Pier and Titan's Piazza; and any lover of geology is well repaid for the labor spent in getting a view of them.

Holyoke, though two hundred feet lower than Tom, is more frequented by visitors. The ascent is not very difficult, and the view from the summit is both grand and beautiful. The river is of course the most attractive feature in the landscape. Far to the north and south it stretches, like a silver, sinuous thread, gradually becoming narrower until it is lost in the distance. Owing to an optical illusion the river seems to ascend in both directions, and at the points where it is lost to view, seems on a level with the eye. It is one of the best examples of this species of optical illusion to be found in this part of the country.

A half century ago the river between this gorge and a point about a quarter of a mile north of it made a most magnificent curve, three miles long; but during the flood in the spring of 1840 a straight channel was cut across, and the water continuing to flow in the old bed as well as the new, there existed for some years what may be called an island in the river.

At least three educational institutions of importance can be seen from the summit of Holyoke—Mount Holyoke Female Seminary in South Hadley, Smith College in Northampton, and Amherst College. Of the towns seen from here Northampton presents the most beautiful aspect. Its fine public and private edifices and grand old elms show to great advantage. One cannot tire of looking at the level plain stretching along on either side of the river, its surface divided into rectangular plats, covered in summer by the various luxuriant crops. The view to the south includes, of course, the river, and also the pleasant village of South Hadley with its Seminary. Springfield is not very plainly visible, but the spires of Hartford, Connecticut, can be seen on a clear day. To the south-west, and at one's very feet, is the wide gorge, with Tom rising directly across, its top being nearly two hundred feet above the position of the observer. To the north-west Greylock is seen shooting up its head beyond the Hoosac. To the north-east Monadnock looms up in the distance, while Wachusett lies low in the eastern horizon. Close to the observer are Toby and Sugar Loaf, each presenting rather peculiar and fantastic outlines. The view from Tom is essentially the same as that from Holyoke, and embracing as it does a radius of at least seventy-five miles in every direction, over the most fertile and charming region in New England, is one of rare beauty.

The ridge forming Tom and Holyoke is, as has been said, composed of greenstone. All the other hills of consequence about the valley of the Connecticut are sandstone, and this is distinctively a sandstone region. Of the other three hills to be spoken of, Toby and Sugar Loaf hold about the same relation to each other as do Holyoke and Tom, the Connecticut flowing between Toby on the east and Sugar Loaf on the west. The former is nearly one thousand feet high, and lies in the northern part of Sunderland village. It is of irregular shape, being indented by a number of valleys, and is densely wooded, so that until within the last few years it has not been a very desirable place from which to obtain a view; but there are now accommodations for sight-seers, and some of the obstructing forest having been removed, interesting views may now be obtained from several parts of the hill. The view of the valley of the Connecticut from the southern part of the highest ridge is perhaps even finer than that from Holyoke.

Sugar Loaf, on the other side of the river, in South Deerfield, is one of the most picturesque objects to be found in this region. It is an isolated peak of red sandstone rising, on the riverside, by an almost perpendicular cliff, to the height of five hundred feet. From the river it looks wholly inaccessible, but on the opposite side is a very good path, rather steep, to be sure, by which one can gain the summit with comparative ease. Upon the top there is a house in which is a good telescope that visitors can use for a small fee, and a very extensive view may thus be obtained. But the most interesting feature of a visit to this hill is to stand upon the brink of the precipice on the eastern side, and look down to the river and green plain five hundred feet below. One feels an almost irresistible desire to take a plunge into the blue waters of the Connecticut.

This hill overlooks the place where one of the most inhuman atrocities was perpetrated by the Indians, and a scene of carnage enacted that will long be remembered by the people of New England. The Bloody Brook massacre occurred in 1675 on a spot about a mile north-west of this hill, and eighty young men, "the very flower of Essex County," while engaged in transporting grain from Deerfield to Hadley, were suprised by the Indians and murdered almost to a man.