Snorri not only relates that Odin changed himself into another form, but he adds that by his spells he turned his enemies into boars. In precisely the same manner does a hag, Ljot, in the Vatnsdæla Saga, say that she could have turned Thorsteinn and Jökull into boars to run about with the wild beasts (c. xxvi.); and the expression verða at gjalti, or at gjöltum, to become a boar, is frequently met with in the Sagas.
"Thereupon came Thorarinn and his men upon them, and Nagli led the way; but when he saw weapons drawn he was frightened, and ran away up the mountain, and became a boar. . . . And Thorarinn and his men took to run, so as to help Nagli, lest he should tumble off the cliffs into the sea" (Eyrbyggja Saga, c. xviii.) A similar expression occurs in the Gisla Saga Surssonar, p. 50. In the Hrolfs Saga Kraka, we meet with a troll in boar's shape, to whom divine honours are paid; and in the Kjalnessinga Saga, c. xv., men are likened to boars—"Then it began to fare with them as it fares with boars when they fight each other, for in the same manner dropped their foam." The true signification of verða at gjalti is to be in such a state of fear as to lose the senses; but it is sufficiently peculiar to have given rise to superstitious stories.
