The Pinfire Lady - P J Gallagher - Bog

Abigail, Lady Penraven, is an Englishwoman set adrift in the wilderness of the Great American Desert. But Abbie is made of stern stuff, and she develops skills with firearms and establishes herself as a gunfighter and wagon master. During a trek westwards, seeking the supposed inheritance left by her deceased father, she encounters numerous perils that test her new skills to the full.