Jewel of the Night by Helen Dickson
Plain and impoverished, Judith Wyatt found an affinity with Captain Jordan Grant. But Captain Grant is in danger, pursued by ruthless enemies for a treasure he carries. When Judith becomes entangled in their plot, Jordan sees her as a burden until he discovers the woman within...
A Penniless Prospect by Joanna Maitland
Without looks or money, Jessamyne Calderwood sees herself as a penniless country mouse. But she is determined to escape her family which is trying to marry her off to a man she despises. Disguised as a gardener's boy on Richard, Earl Hardinge's estate, she's undetected - until Richard rescues her from an attack - the family she is hiding from has found her.