Note 382 — INDEX TO THE NOTES.
Reading edition
centre, i.e. centre of the earth: comp. Par. Lost i. 686, “Men also ... Ransacked the centre”; and Hymn Nat. 162, “The aged Earth ... Shall from the surface to the centre shake.” Sometimes the word ‘centre’ was used of the Earth itself, the fixed centre of the whole universe according to the Ptolemaic system. The idea here conveyed, however, is not that of immovability (as in Par. Reg. iv. 534, “as a centre firm”) but of utter darkness.