lias, upper, middle, and lower, 380 feet; total, 1,120 feet. The mineral spring is said to have issued from a stratum of spongy rock lying at a depth of 540ft. {85a} This would probably be in or near the ferruginous Northampton sand, the lowest layer of the oolite, and lying immediately above the upper lias. {85b} In the year 1897 a boring was commenced within 500 yards of the original well by the artesian engineers, Messrs. Isler and Co., on behalf of the Rev. J. O. Stephens, on the west side of the Stixwould road, with a view to obtaining a second supply of the Woodhall water; this was carried to a depth of 700 feet. The engineers furnished me with a register of the strata so far pierced by the bore, but, as they are not described in the technical terms of geology, it is rather difficult to compare them with those of the old well. At a depth of 490 feet, sandstone with iron pyrites was pierced; this would probably be the ferruginous Northampton sand of the Oolite. It is at a less depth than the same stratum at the Spa well; but that was to be expected, as geologists state that all the geological strata “dip” eastward, and this bore being to the west, the stratum would naturally tilt upward. This born was ultimately abandoned. According to the records of the Spa well, derived from Dr. Snaith, of Horncastle, who knew the well from its birth, the saline spring was found at 540ft.; but Dr. Granville, who visited Woodhall, and wrote his version, in 1841, puts it at 510ft. It is difficult to say which of these two doctors, who differ, should be accepted as the more trustworthy; and in 1841 Dr. Granville would still certainly be able to find plenty of persons familiar with the well and its details. But in the ferruginous sand, or near it, the spring was to be expected; and there it would seem Messrs. Isler, in the new boring, found saline water, though only in small quantity. The depth, according to their computation, was, as we have said 490ft., which is 20ft. above the Spa spring’s level, according to Granville’s version, and 60ft. above the depth given by Snaith. The paucity of the supply of the saline water in the Isler boring may probably be accounted for thus: The trend of the current found in making the Spa well was said to be from south-east to north-west, whereas this new bore is very nearly due west from the Spa well. If, therefore, the stream is of narrow width, this later boring is scarcely in the position to catch more than the side soakage of the current, and it would seem that the main stream can only be tapped either by another boring further north, or by a lateral shaft from the present bore running northward till it encounters the current. There remains, of course, the further and open question as to whether the saline stream formerly passing _through_ the Spa shaft, still continues its former north-westerly course, after having the outlet afforded by that shaft.