These illustrations are of different kinds and sizes: the most numerous being the drawings of ships or boats, canoe-shaped, and alike at both ends (with figures of men and animals), and of fleets fighting against each other, or making an attack upon the shore. The hero of the fight or the champion is generally depicted as much larger than the other combatants, who probably were of one people, though of different tribes, for their arms are similar, and all seem without clothing, though in some cases they are represented as wearing a helmet or a shield, in order to protect them against the blows of their adversaries. [Illustration: Fig. 890.—Rock-tracing, Tanum parish, Bohuslän; large figure probably a champion; numerous small holes, and footprints between the champion and attacking force. Height, 20 feet; width, 15 feet. ] On some rocks are representations of cattle, horses, reindeer, turtles, ostriches, and camels, the latter showing that in earlier times these people were acquainted with more southern climes; the greatest number, and the largest and most complicated in detail of the tracings, occur, especially in the present Sweden, on the shores of the Cattegat, in Bohuslän, “the ancient Viken of the Sagas,” on the coast of the peninsula washed by the Cattegat. They are also found in Norway, especially in Smaalenene, a province contiguous to that of Bohuslän, but more scarce in the north, though found on the Trondhjem fjord. [Illustration: Fig. 891.—Rock-tracing—turtle, cuttle-fish, dromedary, and another animal (possibly a lion), ships, and a footprint. Height, 10½ feet; width, 15 feet.—Ryxö, Brastad parish, Bohuslän. ] [Illustration: Fig. 892.—Rock-tracing representing reindeer, and probably a horse in a boat. Height, 5 feet; width, 12½ feet.—Massleberg, Skee parish, Bohuslän. ] [Illustration: Fig. 893.—Hill showing rock-tracings. ] In Bohuslän the tracings are cut in the quartz, which is the geological formation of the coast: they are mostly upon slightly inclined rocks, which are generally two or three hundred feet or more above the present level of the sea, and which have been polished by the action of the ice. The width of the lines in the same representation varies from one to two inches, and even more; and their depth is often only a third or fourth of an inch, and at times so shallow as to be barely perceptible. Those tracings, which have for hundreds, perhaps for thousands, of years been laid bare to the ravages of the northern climate, are now most difficult to decipher, while those which have been protected by earth are as fresh as if they had been cut to-day; many seem to have been cut near the middle or base of the hills, which were covered with vegetation, and were in the course of time concealed by the detritus from above. [Illustration: