[ANCIENT ECONOMY]. Lot of four works on the economy of the Roman Empire, published in the second half of the eighteenth century. [WORKS:] DE CONCINA, Jacopo. Sul commercio dei Romani in Aquileja, memoria di Jacopo de Concina. Alvisopoli: Bettoni, 1810. 4to (260 x 215mm). Engraved frontispiece with portrait of the author and 6 copper-engraved plates of Roman coins, uncut. Contemporary patterned paper wrappers [IN LOT WITH:] MENGOTTI, Francesco (1749-1830). Del commercio de' Romani dalla prima guerra punica a Costantino... Padua: Stamperia del Seminario, 1787. Large 4to (285 x 230mm). Uncut, in contemporary carta rustica [WITH:] Memoria apologetica del commercio e coltura dei Romani da Romolo a Costantino. Venice: Costantini, 1788. 4to (300 x 230mm). Engraved vignette to title-page, uncut. Contemporary wrappers [WITH:] NICOLA, Fortunato (1720-1775). Riflessioni intorno al commercio antico, e moderno del Regno di Napoli... Second edition [c. 1790]. 4to (245 x 180mm). Contemporary gilt paper boards, decorated endpapers. (4)