have been out-posts and appendages to the principal _Dinas’s_, and to have had a regular connection and communication with _Segontium_: 1. Dinas Dinoethwy, near Pont Newydd, now the residence of Captain Jones.—Length, 180 paces; Breadth, 60; South side slope, 20; North ditto, 30. 2. Hen Gastell, on the brook Carrog, half a mile South of the above, and in the Parish of Llanwnda.—Length, 40 paces; Breadth 30. 3. Dinas Efrog, or Franog, near Collfryn, in Llandwrog.—Length, 70 paces; Breadth, 30. 4. Dinas y Prif, hot far distant from the last, a Square Fort, 50 yards by 50. 5. Craig y Ddinas, a considerable Fortification, on the River Llyfni, a little to the N.W. of Lleiar.—Length, from N. to S. 120 yards; Ditto from E. to W. 90 yards; Slope of the Inner Rampart, on the North side, 10 yards; Ditto of the Outer ditto, 8 yards; Slope on the Sooth side, 40 yards. 6. Caer Ffridd, a Stone Fort, near Ffrwd Ysgyfarnog, not far from Glynn. 7. Bwlan, a fortified eminence, near the same place. 8. Brynn y Gorseddau, an eminence where there are some Druidical Remains. 9. Carnedd Angharad, a Grave in Glynn Park, North of the house. 10. Bedd Gwennen, another Grave, near Ffrwd Ysgyfarnog. 11. Bettws Gwenrhyw, the ruins of an old family Chapel, belonging to Glynn. 12. Muriau Gwilym Ddu, on Tyddyn Tudur Land, the ruins of the habitation of the old Bard of that name. 13. Talwrn yr Arch, on Bodaden Land, and behind that house, on Rhos Tryfan Common, were visible, some years ago, several detached parts of an old Roman Road. Llandwrog is a large extensive Parish, and contains about 10,000 Acres of Land; the resident population, in 1801, was 1175. The Church is dedicated to St. Twrog; it is a Rectory, in the patronage of the Bishop, and is valued in the King’s Books at £11. 11_s._ 5½_d._—Dinas Dinlle is in this Parish, the Roman Road from which to Segontium, is uncommonly interesting, as it is carried chiefly over a flat marsh, once a morass, and broken only in one part by a river, the ford over which is at this day called _Rhyd y Pedestri_; but Rhyd y Equestri, which is mentioned Mr. Rowlands, in his History of Anglesey, is now scarcely known.—Many Roman Coins have been discovered here, particularly those of the Emperors GALLIENUS, TETRICUS SENIOR, TETRICUS CÆSAR, CARAUSIUS, and ALECTUS.