majestic ruins of Roche Castle, now in a state of demolition, the victim of Cromwellian policy. It is well situated for defence; and the builder having adopted the form of the precipice on which it stands, for additional security, its form approaches near to a semicircle in the interior, though on the outside it more resembles a triangle. Its greatest length is 80 yards; its breadth at the broadest part is 40. At one corner is a lofty tower, once august but now in ruins. The view from it is not only extensive, but extremely fine. DUNLEER, 10 m. S. of Dundalk, is a decayed village, but with good inns, being on the high north road; may be made a station for many of the objects in this vicinity. LOUTH, 7 m. S.W. of Dundalk, is now but a decayed village, though giving name to the county; once famous for an Abbey and Priory, but all vestiges swept away. MINERALS. Nothing remarkable. BOTANY. _Artemisia maritima β_, a variety of Sea Wormwood:--on sea-shore. _Bunias Cakile_, Sea Rocket:--on the sands near Maiden Tower near Drogheda. _Cuscuta europæa_, Dodder:--on dry sandy banks near Maiden Tower near Drogheda. _Lepidium ruderale_, Narrow-leaved Wild Cress, or Dittander; near the sea. _Salicornia europæa herbacea_, Jointed Glasswort:--on the sea shore. _Sambucus nigra_, Elder:--in hedges. _Saponaria officinalis_, Soapwort:--in ditches. MAYO Forms the N.W. extremity of the island, and is one of the largest counties, with a great extent of coast. Great part of it is mountainous, boggy, and destitute of roads; but it contains much picturesque scenery highly deserving of investigation, particularly the two lofty mountains of Nephin and Croagh Patrick, the latter of which is an enormous pyramid, and may be seen 40 miles distant. This county abounds, especially in the rocky districts, with _Turlachs_, a name given to plains, some of them very extensive without any visible communication with brooks or rivers, which in the summer afford a rich and firm pasturage, but in the winter become perfect lakes; the waters rising and falling through rocky clefts in the bottoms. Bounded, S. by Galway; W. Atlantic Ocean; N. by Sligo; and E. by Roscommon. ACHILL ISLANDS, 16 m. W. from Castlebar, lie at the mouth of Clewbay, and afford much amusement to the sportsman. The scenery wild and rude.