Cairn L is 135 feet in diameter, and has a circle of 42 stones set on edge, varying from 6 to 12 feet in length, and 3 to 4 feet in height. It is chambered, and the roof fashioned by overlapping stones similar to that of Newgrange. The passage and chamber have a combined length of 29 feet, and the latter is 13 feet in width. On the floor of the passage is a flagstone, measuring 8 feet 9 inches by 3 feet 6 inches; and in one of these recesses is the largest and best finished stone basin yet discovered, measuring 5 feet 9 inches by 3 feet 1 inch. Fragments of pottery to the number of 154 were found, and under the basin pieces of burnt bone and many human teeth. Cairn T is the most conspicuous monument of the group; it measures 116 feet in diameter, and rises with sloping sides to a height of 21 feet. It contains a recessed chamber, like that at Newgrange, in miniature, the entrance to which faces due east, and is reached by a shallow, funnel-shaped passage. Round the base is a closely-set circle of 37 stones, varying from 6 to 12 feet in length, and acting as a kind of retaining fence to the loose, dry boulders which form the body of the tumulus. One of these stones on the north side is popularly known as the ‘Hag’s Chair’ (see p. 39). Fergusson states there can be little doubt that it was intended as a seat, or throne, but by whom it was raised and for what purpose it is difficult to say. When opened in 1865 the roofing of the passage and much of the chamber had fallen away, leaving them filled with stones; the combined length is 28 feet, and the full width of the chamber is 16 feet 4 inches. The floor of the central octagonal chamber was covered by three large and two small flags, beneath which were found pieces of burnt bone and charcoal. It has three recesses, about 4 feet square. Conwell, without the slightest authority, rushed to the conclusion that this particular monument must be the tomb of Ollamh Fodhla, and that the chair cannot be other than the judicial seat, or throne, of that famous king. He writes: ‘And to whom, keeping in view the preceding MS. testimony,[45] could this great megalithic chair be more appropriately ascribed than to Ollamh Fodhla? It would be natural to suppose that, for the site of the tomb of the great king and law-maker, his posterity (or, indeed, probably he himself, during his own lifetime) selected the most elevated spot on the entire range; hence we propose to call the carn on that spot--904 feet above the sea-level, and situated on the middle hill--Ollamh Fodhla’s tomb, and the great stone seat “Ollamh Fodhla’s Chair”; and the ruined remains of the smaller surrounding cairns, six of which still remain, the tombs of his sons and grandsons, mentioned in the previous extracts. In fact, on the summit of the highest hill in the site of this ancient royal cemetery, we believe there still exist the remains of the tombs of the dynasty of Ollamh Fodhla’!