found: Frye, J. North to Thule, 1985:CIP title page (Pytheas of Massalia)
found: LC data base, 11-23-84(hdg.: Pytheas, of Massalia)
found: Megalē Hellēnikē enkykl.(Pytheas)
found: Le pays de Thulé, 1874:page 3 (Pythéas, de Marseille)
found: Il viaggio di Pitea sull'oceano, 2002:page 13 (Pitea di Massalia)
found: Collier's encyclopedia, 1994(hdg.: Pytheas; b. 380 B.C. at Massilia (Marseille) Grecian astronomer and explorer known to have computed the latitude of Marseille almost exactly; wrote two books, "Concerning the ocean," and "Description of the earth" which were destroyed by the fire at the library at Alexandria in 47 B.C.)
found: Wikipedia, viewed November 1, 2016(Pytheas; Pytheas of Massalia; fl. 4th century BC; Greek geographer and explorer from the Greek colony of Massalia; he made a voyage of exploration to northwestern Europe in about 325 BC but his description of it, widely known in antiquity, has not survived; in this voyage he circumnavigated and visited a considerable part of Great Britain; he is the first person on record to describe the Midnight Sun; he is the first known scientific visitor and reporter of the Arctic, polar ice and the Germanic tribes; he introduced the idea of distant Thule to the geographic imnagination and his account of the tides is the earliest known to suggest the moon as their cause; he may have reached Iceland; born approximately 350 BC; died approximately 285 BC)