A century or more after the death in 1231 of Earl John, we find Reginald Chen III, known as Morar na Shein or "Lord" Schen, in possession of a moiety of the Caithness earldom, without the title, and living in Latheron and Halkirk parishes, while the other moiety was held by the Caithness Earls of the line of Angus, and in 1340 we find Reginald More, Chamberlain of Scotland, ancestor of the Crichton or Sinclair Earls of Caithness, acquiring from Malise II, one of the Stratherne Earls of Caithness and a descendant of the line of Paul and also of the line of Erlend, part of south Caithness (including Berridale), which therefore Reginald Chen III did not then own or acquire, though he owned half Caithness. But Reginald Chen III did acquire Berridale and other lands later in David II's reign according to _Origines Parochiales_, II, p. 764.
Now it is known from other sources that Reginald Chen III was a grandson of Johanna of Strathnaver, the mysterious lady of unrecorded parentage already referred to, who owned land in "Strathnauir," and who was dead in 1269, and who had married, at a date which we hope to fix, Freskin de Moravia, Lord of Duffus, then also dead, and had had by him two daughters, Mary and Christian, who were married respectively to Reginald Chen II and William de Federeth I (whose sons respectively were Reginald Chen III and William de Federeth II) and these ladies succeeded each to one fourth of Caithness; and a grant,[17] which was made in David II's time by William de Federeth II in favour of Reginald Chen III, placed him in possession of William de Federeth II's quarter of Caithness. Reginald Chen III thus had all the half share of Caithness which was held by his grandmother, Johanna of Strathnaver. We also know that by another grant in 1286[18] William de Federeth I had already conveyed to Reginald Chen II four davachs of land in Strathnaver and all his other lands there; and, besides these grants, we have authentic record in May 1269, which recites that Lady Johanna had before that date granted a considerable part of her lands in Strathnaver to the Bishop of Moray for the maintenance of two chaplains to minister in the Cathedral of Elgin.
By the above record, which is a regrant of the Strathnaver lands by Archebald Bishop of Moray in May 1269 to Reginald Chen II, not only is his marriage before that date to Mary daughter of Johanna by Freskin de Moravia proved, but the lands in Strathnaver are identifiable. They were "Langeval and Rossewal, tofftys de Dovyr, Achenedess, Clibr', Ardovyr and Cornefern," which now are known in part as Langdale, Rossal, Achness, Clibreck and Coire-na-fearn, while "tofftys" are "tofts," and "Dovyr" and "Ardovyr" are respectively old Gaelic for "water" and for "upper water." "Dovyr" would denote the River Naver and loch of that name, and "Ardovyr" would mean Loch Coire and the Mallard River, that is the "Abhain 'a Mhail Aird" of the Ordnance Map (whatever that may mean),[19] which rises in Loch Coire, and, after a course of six miles from its upper valley, falls about 330 feet below its source into the River Naver at Dalharrold. These lands of the Lady Johanna lay partly to the south of Loch Naver, extended southwards nearly to Ben Armine, and stretched westwards to Loch Vellich or Bealach and the Crask and Mudale, eastwards to Loch Truderscaig, and northwards down the valley of the Naver at least as far as Syre. Part of them, close to Achness,[30] is to this day known locally as Kerrow-na-Shein, or Chen's Quarter, either after Johanna's son-in-law, Sir Reginald Chen II, or after her grandson of the same name, the great "Morar na Shein," about whom so many legends still survive in Cat. These lands in Strathnaver are roughly hatched on the map of Cat in this volume, and, as she gave them away in charitable trust, they probably formed only a small part of her whole estate after her marriage with Freskin de Moravia, which probably comprised the old Parish of Farr, now divided into Tongue, Farr, and Reay.