[POLAR EXPLORATION]. A group of volumes of the British National Expeditions to the Antarctic (1910-1913). London: Harrison and Sons, 1921-1924. 6 folio volumes. Illustrated. Publisher?s printed green wrappers (wrappers worn, soiled, dampstained, sunned, occasional ink markings). FIRST EDITIONS. Titles include: Observations on the Aurora; Determinations of Gravity; The Physiography of the Ross Archipelago (with 5 folding maps in rear pocket); Physiography of the Beardmore Glacier Region (with 1 folding map in rear pocket); Physiography (Robertson Bay and Terra Nova Bay Regions; with 3 folding maps in rear pocket); Miscellaneous Data.