Nec, si rationem siderum ignoret, poetas iniellegat said Quintilian of Γ ραμματική; and in the history of scholarship during the last two centuries there is much to confirm his sentence. The elements of astronomy were once part of a scholar's ordinary equipment, and astronomical allusions in the poets, if expounded at all and not left by the editor to the knowledge and intelligence of the reader, were usually expounded aright. The first three lines of Lucan's seventh book are briefly but correctly explained by the scholiast, and Oudendorp so late as 1728 was content to quote his explanation: then Cortius and Burmann and Bentley came forward to misinterpret them, and they have been misinterpreted ever since, because editors of the classics no longer know which way the sun moves.