The Norsemen were in the habit of carrying stones on board their warships to be used as missiles. It is told in the Færeyinga Saga of Sigmund Brestisson that when about to attack the ships of another Viking lying on the opposite side of an island on the coast of Sweden, he spent the whole night in landing the goods and plunder from his vessels, and breaking up stones, and loading his vessel with them to serve as missiles in the attack. The same thing had been done by the Earl’s men in this case before the commencement of the fight. Footnote 328: Probably at the place now called Swiney, in Caithness, near Lybster. Though the context here seems to imply that Swiney, in Caithness, is meant, it seems that Grim was in the island of Swona (the small island between Hoy and South Ronaldsay), when Swein, Asleif’s son, visited him (see p. 92). Perhaps Swiney, in Caithness, was so named from its being the property of Grim of Swona. Footnote 329: Aurrida Firth, or Salmon-trout Firth, now the Bay of Firth. Footnote 330: Flydruness seems to be the same as Fluguness, in Hrossey (Mainland), mentioned as the residence of Blan and his father Thorstein, at p. 74. Footnote 331: The Earl’s seat at Orphir appears to have consisted of a cluster of buildings, of which the main hall or skáli answered to the public room of the residence. The descriptions given of the Orkney skális are wanting in that minuteness which is necessary to enable us to understand the details of their construction. No doubt they were similar to those of Iceland, the larger of which were constructed partly of stone and partly of timber, the middle division of the hall being higher in the roof than the “aisles” on either side of it, and separated from them by a row of pillars running parallel to each of the side walls. The walls of the aisles and the spaces between the pillars were covered with wainscoting, sometimes with carved work, and on high days hung with tapestry. Shields and weapons were hung along the sides of the hall, above the benches, and the fires were lit on hearths in the middle of the floor. The benches were ranged along both sides of the hall; the “high seat” of the Earl, or owner of the skáli, was in the centre of the south side, and the seats of highest honour were those next to him on either side. Footnote 332: Probably a large flagstone set on end to serve as a partition-wall. This is a common feature of the ancient structures in Caithness and Orkney. It was in the shadow of this flagstone that Swein, Asleif’s son, stood when he killed Swein Brióstreip (see p. 95). Footnote 333: Serving the table, and holding lights. The light-bearers or candle-holders were a distinct class of servants at the King’s court. This custom is said to have been first introduced by King Olaf Kyrre in the latter half of the eleventh century. Footnote 334: