Dictionary of Greek and Roman Geography/Abalus
ABALUS, was said by Pytheas to be an island in the northern ocean, upon which amber was washed by the waves, distant a day's sail from the aestuary called Mentonomon, on which the Gothones dwelt. This island was called Basilia by Timaeus, and Baltia by Xenophon of Lampsacus. It was probably a portion of the Prussian coast upon the Baltic. (Plin. xxxvii. 7. s. 11; Diod. v. 23; Ukert, Geographie, vol. ii. Pt. ii. p. 33, seq.)