The most flourishing production of Caithness appears to be the flagstones, layers of mud and fish bones pressed together ages ago, which its quarries send forth to pave more genial regions. Its waters, too, grow a valuable crop, as one may know who has ever seen the multitudinous herring-fishing fleet set sail from Wick in the long summer twilight. Angling can be had in a chain of some dozen lochs drained by the Thurso river that runs through the county from south to north, at the mouth of which over 2500 salmon were once netted in one haul. In the south, if heather were edible, the folk should be fat; and below darkly naked cones, we find glens such as Berriedale, in parts rich as well as romantic, like a miniature Switzerland of which Morven is the Matterhorn. Here again we have a duodecimo edition of Highlands and Lowlands bound together. In the north-east the people are tall and sturdy, with plain marks of Scandinavian origin, like their _sters_ and _dales_. On the south and west rather, we find clans bearing such names as Mackay, Sutherland, Keith, and Gunn, the last certainly a Norse tribe who can wear only an adopted tartan. Most illustrious of all were the Sinclairs, that held the now dwindled Earldom of Caithness, one of those Norman families settling themselves so masterfully all over Scotland. From this farthest point of the kingdom, hundreds of them followed their Earl to Flodden, and hardly one came back to tell the tale of that “Black Monday,” since when, it is said, no Sinclair will cross the Ord ridge on a Monday. Another sore loss fell on the clan a century later, when a certain Colonel Sinclair, heedless of what foreign enlistment regulations had then taken shape, led a regiment of his clan to serve Gustavus Adolphus against Norway, but, attacked by Norwegian peasants in a narrow gorge, more than half of them were crushed beneath rocks hurled down from above, as the French soldiers in Tyrol, or the Turks in defiles of the Kurdish Dersim. The monument on the spot records the death of fourteen hundred kindly Scots, which appears an exaggeration; but it is said that not a score escaped with their lives. Many other grim and gory tales might be told of this race, as some are in Mr. John Sinclair’s book above mentioned. The shells of castles fringing these shores have as often as not had a Sinclair lord at one period or other, like Castle Sinclair, almost crumbled away, while the older Girnigo, on to which it was built, still stoutly defies the weather. To-day the most outstanding branch of the family is that of Thurso, first distinguished in a new field by Sir John Sinclair’s _Statistical Account of Scotland_, and by his improvements in the county; then by the author of _Holiday House_, and by more than one dignitary of the English Church. This family is notable for stature as well as [Illustration: MOOR AND MOUNTAIN, ROSS-SHIRE]