A twist of history and libido with characters converging on the Boston of the salty, naughty 1740's. Lady Sibyll, close kin to Amber, determines to rekindle the flickering flame of her former lover, the port collector, Sir Harry Frankland. She finds as her opponent Harry's ""ward"", a Marblehead miss of low but virtuous circumstances whose beauty had won Harry's heart. It takes successive upheavals,- the Louisbourg expedition, a side journey to Barbados (where Sibyll made unsuccessful war on the heart of young Washington, who was saved by smallpox), and finally - while Harry and Agnes were on the Grand Tour, a Lisbon earthquake, before Sibyll was effectively routed and Agnes rewarded by her marriage lines. Period rather than historical romance in the escape category, with enough of the ingredients to insure a popular success in its field.