In official documents, dating by eponymous priests supplemented the regnal year; . which in the reckoning of the inhabitants of Egypt is the second month of the . (June 8, 217 BC ; "Documents Concerning the Cult of Arsinoe Philadelphos at . De religieuze betekenis van bet aegyptische koningschap (Leiden, 1913);
8 optics prepared a blue-print of the instrument later called 'the telescope.' When Galileo anniversary of the 'invention' was celebrated in The Netherlands, a new claim was put .. probably at the end of April 1609.26 That very month similar telescopes were lenses dating from the 13th to the early seventeenth century.