The rocks of this parish are somewhat similar to those of St. Mervyn, which is already stated to belong to the calcareous series. The rocks are well exposed on the shores of Padstow harbour, and therefore they merit a more particular description. The southern part of this parish consists chiefly of a blue slate, which in some strata is very fissile, and in other strata it separates into thick lamellar pieces, and passes in the adjoining strata into calcareous schist. This slate at Dinah’s Cave contains a bed of black limestone, which may be a continuation of that on the opposite side of the harbour at Rock ferry. At the latter place, the transitions between the blue slate and the limestone are beautifully displayed. The limestone is of the same nature as that in Veryan on the south coast. Proceeding towards Slepper Point, at the entrance of the harbour, after passing the town of Padstow, the cliffs consist of alternate beds of compact and of schistose greenstone; these continue to line the shore with broken rocks for more than a mile, and they are succeeded by red and greenish slates, which are lamellar, of a fine texture, and rather hard, resembling the mineral called novaculite or hornestone; and connected with this slate occurs a compact crystalline rock like that of Trevose Head in St. Mervyn, consisting of small crystals of glossy felspar, and of a scaly pulverulent mineral of a greenish colour, the nature of which is not very apparent. This singular rock may be the equivalent of diallage rock, a member of the serpentine series, as its position bears a great resemblance to that of the Lizard magnesian rocks. At Penniscen Bay, on the north side of the parish, the cliff exhibits many alternations of limestone and slate; this limestone is more crystalline than the black limestone of Rock Ferry, approaching nearer to the Plymouth limestone in its appearance; but organic remains have not yet been discovered in it. The slate between the beds of limestone is a calcareous schist, and is of a white colour, and earthy where it has been weathered; but when perfect it is found, especially near the limestone, to be of a blue colour with broad diagonal bands or stripes of brown, precisely like the calcareous slate which occurs in Werrington, near Yealm Bridge, where it is extensively quarried for chimney-pieces, and for other domestic or ornamental purposes. PAUL. HALS. The manuscript relating to this parish is lost. TONKIN. Paul is in the hundred of Penwith, and is bounded to the west by St. Burian and Sancreed, to the north by Maddern, to the east and south by the Channel and Mount’s Bay.