I. Official port towns in Virginia and origins of Marlborough 5 II. John Mercer's occupation of Marlborough, 1726-1730 15 III. Mercer's consolidation of Marlborough, 1730-1740 21 IV. Marlborough at its ascendancy, 1741-1750 27 V. Mercer and Marlborough, from zenith to decline, 1751-1768 49 VI. Dissolution of Marlborough 61