“The soil to which the trees are fixed, and in which they grew, is a soft greasy clay; but for many inches above the surface, the soil is composed of rotten leaves, scarcely distinguishable to the eye, many of which may be separated by putting the soil in water and dexterously and patiently using the Spatula, or blunt knife. By this method I obtained some imperfect leaves of the _Ilexaquifolium_, which are now in the Herbarium of the right honourable Sir Joseph Banks; and some other leaves, though less perfect, seem to belong to some species of willow. In this stratum of rotten leaves we could also distinguish some roots of _Arundo Phragmites_. “These islets, according to the most accurate information, extend at least twelve miles in length, and about a mile in breadth, opposite to Sutton shore. The water without them toward the sea, generally deepens suddenly, so as to form a steep bank. The channels between the several islets, when the islets are dry, in the lowest ebbs of the year, are from four to twelve feet deep: their bottoms are clay or sand, and their direction is generally from east to west. “A well, dug at Sutton by Joshua Searby, shews that a moor of the same nature is found under ground in that part of the country, at the depth of sixteen feet, consequently very nearly on the same level with that which constitutes the islets. The disposition of the strata was found to be nearly as follows: clay sixteen feet; moor, similar to that of the islets, three or four ditto; soft moor, like the scourings of a ditch bottom, mixed with shells and silt, twenty feet; marly clay, one foot; chalky rock, from one to two feet; clay, thirty-one yards; gravel and water; the water has a chalybeate taste. In order to ascertain the course of this subterraneous stratum of decayed vegetables, Sir Joseph Banks directed a boring to be made in the fields belonging to the royal Society in the parish of Mablethorpe. Moor of a similar nature to that of Searby’s well, and the islets, was found very nearly on the same level, about four feet thick, and under a soft clay.