of the Merrin river. It separates part of Montgomeryshire from Cardiganshire, and continues to do so for about seven miles, and then turns into Cardiganshire. Here receiving a tributary stream, about a mile and three quarters further on, it falls into the Ystwyth. At the confluence a very elegant stone bridge has been erected, at the expence of the late Mr. Johnes. The Ystwyth continues to flow between tremendous mountains till it reaches Pentre Briwnant, where it receives the Briw brook on one side, and another stream on the other. It now approaches Havod, and is, of course, about to receive all the embellishments art can give to nature. Two streams, forming the eastern boundary of Havod, fall into it, one on the north and the other on the south side. In its passage through this delightful paradise, it meets with two more streams from the south, the westernmost forming the western boundary of Havod on this side of the Ystwyth. Over this part of the Ystwyth, the late Mr. Johnes erected another bridge. This is in the Moorish style. Half a mile below the last-mentioned stream, another, from the north, flows into the Ystwyth, about half a mile, on the other part of the western boundary of Havod. Having now quitted the confines of Havod, it continues its course, overhung by well wooded mountains, for half a mile further, where a neat stone bridge has been thrown across it, called Pont rhyd y Groes, about 200 yards to the west of which, another rivulet falls into the Ystwyth. This comes in a curvilinear course from the north, and has its rise near a village called Blaen Pentre. A little more than a quarter of a mile before it meets the Ystwyth, another rivulet falls into it, taking its rise not far distant from the other, and curving in an opposite direction. This has two tributary streams. The Ystwyth now takes a southerly direction, and then turns again at nearly right angles, towards the west. Here it receives a brook called Nanty-quarrel, or Quarry Brook, which divides its southern bank, and which flows in extent about three miles. The next object of notice on the Ystwyth is the romantic bridge of Llanavan, which, like the others on this river, consists of a single arch, and is built of stone. About a mile and three quarters from this, it receives two brooks, whose mouths are exactly opposite to each other. The smallest comes from the north, and the other from the south. This last is called Crognant, and runs down the mountains between Llanwnws and Lledrod. The Ystwyth having made an angle just at the stream it met with, after flowing under Llanavan bridge, runs towards the north-west; and the next stream that falls into it after Crognant, comes from the westward. Just below this, is a ford, called Rhyd-y-ceir, used by people coming or going from Llanilar to Llanavan. The northern bank of the Ystwyth is here adorned by the noble park and luxuriant farms of the Earl of Lisburne, called Crosswood. A mile beyond the last stream comes another rivulet from the north-east, which rising a little above Rhosrhyd ucha', comes down a valley called Cwm Magwyr, and about a mile from its embouchure receives a brook, about three miles in extent. About two miles further, the Ystwyth receives another rivulet from the north-east, which rises a little to the north of the high road from the Devil's Bridge to Aberystwyth, between the eighth and ninth milestone. This receives five tributary streams, and flows through the village of Llanfihangely-Croyddyn. The next stream the Ystwyth receives, comes from the south, passing by the plantations of Castle Hill, the seat of Major Williams, and in a cleft it has made in the mountain by its impetuosity, falls into the Ystwyth, just by the village of Llanilar. About two miles beyond, it is reinforced by a trifling stream from the north, and a little further by a larger one called the Mayde, from the south, which has been made by the union of two smaller. Here stands Abermayde; and here the Ystwyth assumes a most picturesque appearance. Two miles further, it receives another brook called Llolwyn, from the south, over which, as well as the Mayde, is a stone bridge of a single arch. About half a mile further on the Ystwyth, where it curves, uniting with the well-wooded rocks on its banks, contributing to give it a most romantic appearance, stands Llanychaiarn bridge. Two trifling streams afterwards empty themselves into the Ystwyth, from the south-west, when, winding round the base of Pendinas Mount, it falls into the river Rheidol, just before that river meets the Ocean, and gives name to the town of Aberystwyth. Leland says "There is but a great hill betwyxt Ostwith river and Stratflure. So that. there is but distance of 2 miles bytwyxt the streames of Tyve and Ostwyth." Leland must have been much mistaken, in his calculation of the proximity of the Teivi and Ystwyth, for in their nearest approach, there are between three and four miles. In another place, speaking of the Ystwyth, he says, "It is in Comeustwith, and so rennith good vi miles thorough Comeustwith, and a vi or vii mo miles to Abreustwith. About the middle of this Ustwith Botom that I ridde yn, being as I gesse a iiii miles yn length I saw on the right honde on a hill side Clothmoyne, wher hath bene greate digging for Leade, the melting wherof hath destroid the Woddes that sum time grew plentifulli thereabout. I hard a mervelus tale of a crow fedd by a digger there, that tooke away his Feeder's pursse, and wille the digger folowid the crow for his purs, the residew of his felows were oppressid in the Pitte with a Ruin." The Rheidol. The Rheidol rises in a lake called Llyn Rheidol, in the Plinlimmon mountains ;* (cus * These mountains are three in number, though, erroneously, only one is generally so called. Leland has made this mistake, as well as most modern tourists. He says, " I vuyd Penlimnmon the Hed of Wy. It seemed to me a veri |