THAT part of the Irish sea which divideth Ireland from Great Britain, is very much defamed both by ancient and modern writers, in regard of its boysterousness and tempestuousness, as if it were more subject to storms and raging weather than any other, and consequently not to be passed
THE common cause of the casting away of ships upon this sea, and upon the east coast of Ireland, is this, that in the long dark winter nights (when this disaster is more frequent than at other times of the year) some furious storm arising, the ships are dash'd against the rocks, against the rocky shores, or against those grounds which extend themselves betwixt the Tuskard and the bay of Dublin, whilst the steermen and pilots by reason of the darkness not being able to discern the land, or any of their wonted marks, do not know which way to steer to shun those dangerous places, and to keep themselves in the open sea.
THE ground of the Irish sea, as well in the midst, as under the land, is almost every where clear sand, but in some places black and muddy or oozy earth; in very few places rough and sharp; and scarce any where else but in the bay of Wicklow, so hard and stifly compacted, that the anchors can take no hold of it.
WHAT concerneth the ebbing and flowing in this sea, which invironeth Ireland upon all the west side it floweth against the land, and the ebb falleth back from it into the sea, the flood from, and the ebb towards the west, for which reason very great tides, as well of ebb as flood go upon all this coast, not only the open shores, but in the bays and inlets (even those which go a great way into the land, as the haven of Limerick) so as those, who have been at Galloway, do assure us, that it doth so mightily ebb and flow there, that at high water great vessels may sail over those rocks, the which with the ebb come above water.
Upon the other side of Ireland it ebbeth and floweth along the land, for upon the north side of Ireland the ebb and flood falleth in the same manner as upon the west side, flowing from, and ebbing towards the west. But upon the east side, from Fair-foreland unto Carlingford, the flood cometh from, and the ebb falleth to the north as upon the rest of this east side, to wit, from Carlingford to Carnesore, it floweth from the south, and ebbeth from the north. For although upon all this side the flood runneth along the land, yet doth it not take its beginning from one and the same, but two contrary points; the which two floods coming the one out of the main sea in the north, and the other out of the main sea in the south, do meet and stop one another before the haven of Carlingford.
From Tuskard and Carnesore as far as to the head of Clare, being the whole southeast coast of Munster, the flood falleth along the coast ENE, and the ebb WSW. But upon the rest of the coast of Munster, beyond the head of Clare westward, which coast lieth W and by S, the flood falleth eastward, and the ebb to the west.
THAT which the sea-faring men do witness, that in the sound of Blasques, of Dalkee, and in that of Lambay, as also in some other narrow channels of this sea, there goeth a very strong tide, as well of the ebb as flood, is no other than may be observed almost everywhere else in places of the like nature.
But it is much to be wondred, what the same do relate of the channel or entrance of the haven of Wexford, to wit, that it ebbeth and floweth there three hours sooner than without in the open sea, so as when it is high water in the
MORE strange it is what Giraldus writeth of the havens of Wicklow and Arklow, to wit, that in Wicklow haven it ever floweth, when in the sea it ebbeth, and that it ebbeth there when it floweth in the sea. And that in the same river (this haven being nothing else but the mouth of a little river) the water is salt as well when the ebb is at the lowest, as at the flowing and high waters and that to the contrary in that rivulet, which at Arklow dischargeth it self into the sea, the water keepeth its sweetness at all times (never receiving the mixture of any saltness) as well with the flood and high water, as with the ebb. But experience sheweth these things to be repugnant to the truth, as also what he writeth of a rock not far from Arklow, at the one side whereof he saith that it always ebbeth, when it doth flow on the other, and to the contrary. Also that in Milford haven (situated in the southernmost part of Wales, in a manner over against Waterford) and upon the next coasts, it ebbeth and floweth at quite contrary times to what it doth at Dublin, and the coast thereabouts, so that it should begin to ebb in Milford haven, when in the bay of Dublin it beginneth to flow, and to flow in Milford haven when it beginneth to ebb at Dublin: which how untrue it is, all those can witness, who having been in both places, have had the curiosity to observe the times and hours, at what age of the moon forever, wherein it doth begin to ebb and to flow there.