MACKAY, Charles. MEMOIRS OF EXTRAORDINARY POPULAR DELUSIONS AND THE MADNESS OF CROWDS, 2 VOLUMES. London: Office of the National Illustrated Library, 1852. 2nd edition. Two volumes bound as one: viii,303,vi,322 pp. Frontispiece and a vignette title-page at the start of each volume, with wood-engraved text illustrations throughout. Octavo, publisher's green cloth binding, rebacked with original backstrip laid down, blocked in blind on sides, dulled gilt lettering on spine. Slight wear to forecorners, but a sound and attractive copy overall. Text leaves are clean, though some of the paper has toned. Engraved bookplate of G. I. Fisher to front pastedown and a library stamp on the recto of each frontisp. and on the vignette t.p. for Volume 1. No other marks. A very good copy of this early, ground breaking study of crowd behavior, whose topics include John Law and the Mississippi Scheme, the South Sea Bubble, tulipomania, the crusades, witch mania, haunted houses, duels and ordeals, etc., and whose influence extends through today. A scarce title in the less common one-volume format, housed a custom clamshell box.