John Mair; BOOK-KEEPING METHODIZ'D: OR, A METHODICAL TREATISE OF MERCHANT-ACCOMPTS. 3rd Ed. (Edinburgh: W. Sands, et al., 1749) A thorough explanation of accounting in the colonial era, with a chapter devoted to trade in Maryland and Virginia, reproducing an account book; signed by William Lux, 1751, an early Baltimore merchant, for whom Light Street is named. 8vo, full calf of the period. Text toned and showing signs of extended use; the binding fragile, with improvised repairs.