"_15th August, 1814._--Fine morning. We get again into the Pentland Frith, and with the aid of a pilot-boat belonging to the lighthouse service, from South Ronaldsha, we attempt the Skerries. Notwithstanding the fair weather, we have a specimen of the violence of the flood-tide, which forms whirlpools on the shallow sunken rocks by the islands of Swona and Stroma, and in the deep water makes strange, smooth, whirling, and swelling eddies, called by the sailors, _wells_. We run through the _wells of Tuftile_ in particular, which, in the least stress of weather, wheel a large ship round and round, without respect either to helm or sails. Hence the distinction of _wells_ and _waves_ in Old English; the _well_ being that smooth, glassy, oily-looking eddy, the force of which seems to the eye almost resistless. The bursting of the waves in foam around these strange eddies has a bewildering and confused appearance, which it is impossible to describe. Get off the Skerries about ten o'clock, and land easily; it is the first time a boat has got there for several days. The _Skerries_[76] is an island about sixty acres, of fine short herbage, belonging to Lord Dundas; it is surrounded by a reef of precipitous rocks, not very high, but inaccessible, unless where the ocean has made ravines among them, and where stairs have been cut down to the water for the lighthouse service. Those inlets have a romantic appearance, and have been christened by the sailors, the Parliament House, the Seals' Lying-in-Hospital, etc. The last inlet, after rushing through a deep chasm, which is open overhead, is continued under ground, and then again opens to the sky in the middle of the island; in this hole the seals bring out their whelps; when the tide is high, the waves rise up through this aperture in the middle of the isle--like the blowing of a whale in noise and appearance. There is another round cauldron of solid rock, to which the waves have access through a natural arch in the rock, having another and lesser arch rising just above it; in hard weather, the waves rush through both apertures with a horrid noise; the workmen called it the Carron Blast, and, indeed, the variety of noises which issued from the abyss, somewhat reminded me of that engine. Take my rifle, and walk round the cliffs in search of seals, but see none, and only disturb the digestion of certain aldermen-cormorants, who were sitting on the points of the crags after a good fish breakfast; only made one good shot out of four. The lighthouse is too low, and on the old construction, yet it is of the last importance. The keeper is an old man-of-war's-man, of whom Mr. Stevenson observed that he was a great swearer when he first came; but after a year or two's residence in this solitary abode, became a changed man. There are about fifty head of cattle on the island; they must be got in and off with great danger and difficulty. There is no water upon the isle, except what remains