iii. 101b:--The second was Coll son of Collfrewi who guarded Dallwaran Dallben's sow, that came burrowing as far as the Headland of Penwedic in Kernyw and then took to the sea; and she came to land at Aber Tarogi in Gwent Is-coed with Coll keeping his hold of her bristles whithersoever she went on sea or land. At Maes Gwenith in Gwent she dropped three grains of wheat and three bees, and ever since Gwent has the best wheat and bees. From Gwent she proceeded to Dyfed and dropped a grain of barley and a porker, and ever since Dyfed has the best barley and pigs: it was in Llonnio Llonnwen these were dropped. Afterwards she proceeded to Arfon (sic) and in Lleyn she dropped the grain of rye, and ever since Lleyn and Eifionyd have the best rye. And on the side of Rhiw Gyferthwch she dropped a wolf-cub and an eagle-chick. Coll gave the eagle to Brynach the Goidel of Dinas Affaraon, and the wolf to Menwaed lord of Arllechwed, and one often hears of Brynach's Wolf and Menwaed's Eagle [the writer was careless: he has made the owners exchange pests]. Then she went as far as the Maen Du in Arfon, where she dropped a kitten and Coll cast it into the Menai. That was the Cath Balwg (sic), 'Palug's Cat': it proved a molestation to the Isle of Mona subsequently.
Such are the versions we have of this story, and a few notes on the names seem necessary before proceeding further. Coll is called Coll son of Collurewy in i. 30, and Coll son of Kallureuy in ii. 56: all that is known of him comes from other Triads, i. 32-3, ii. 20, and iii. 90. The first two tell us that he was one of the Three chief Enchanters of the Isle of Prydain, and that he was taught his magic by Rhudlwm the Giant; while ii. 20 calls the latter a dwarf and adds that Coll was nephew to him. The matter is differently put in iii. 90, to the effect that Rhudlwm the Giant learnt his magic from Eid[il]ig the Dwarf and from Coll son of Collfrewi. Nothing is known of Dallwyr's Glen in Kernyw, or of the person after whom it was named. Kernyw is the Welsh for Cornwall, but if Penryn Awstin or Hawstin is to be identified with Aust Cliff on the Severn Sea in Gloucestershire, the story would seem to indicate a time when Cornwall extended north-eastwards as far as that point. The later Triad, iii. 101, avoids Penryn Awstin and substitutes Penwedic, which recalls some such a name as Pengwaed [90] or Penwith in Cornwall: elsewhere Penwedic [91] is only given as the name of the most northern hundred of Keredigion. Gwent Is-coed means Gwent below the Wood or Forest, and Aber Torogi or Tarogi--omitted, probably by accident, in ii. 56--is now Caldicot Pill, where the small river Tarogi, now called Troggy, discharges itself not very far from Portskewet. Maes Gwenith in the same neighbourhood is still known by that name. The correct spelling of the name of the place in Penfro was probably Llonyon, but it is variously given as Llonwen, Llonyon, and Llonion, not to mention the Llonnio Llonnwen of the later form of the Triad: should this last prove to be based on any authority one might suggest Llonyon Henwen, so called after the sow, as the original. The modern Welsh spelling of Llonyon would be Llonion, and it is identified by Mr. Egerton Phillimore with Lanion near Pembroke [92]. Rhiw Gyferthwch is guessed to have been one of the slopes of Snowdon on the Bedgelert side; but I have failed to discover anybody who has ever heard the name used in that neighbourhood.