A Regency novel smack dab in the middle of Marion Chesney's romance writing career, published in 1988.
This book had a slightly different plot from Marion Chesney's usual murderous villains, with the main storyline about being an impostor. She utilized this storyline from time to time, but only a couple have this as the main impetus (case in point, her book Lucy) while the rest are used as gimmicks by one of the characters for only a brief span of time (say, in Poor Relations).
Felicity Channing was the youngest daughter of a rich man's widow who had married a greedy bully who forced his timid wife ever closer to a decline. He had arranged marriages for all of Felicity's older sisters to older, nasty-seeming men with a lot of money so that none of them would be competition for the Channing fortune. Felicity, being the youngest, knew what was coming but was adamant it wouldn't happen to her.
At the beginning of the book, she and her old governess frequently dressed as men in their lonely county and went down to the local inn to have a drink and delight in their little adventure. One day, she meets Lord Arthur Bellamy who seems to see through her disguise as Mr. Freddie Channing. They have a few interactions as Lord Bellamy meets her as Felicity when his friend is invited by a gross older relative who has been arranged to marry Felicity. They don't exactly hit it off but he is concerned enough for her when the next morning, Felicity was said to have run away and fallen off a cliff and drowned. He even gets a small jetty and goes diving for her remains.
Meanwhile, Felicity, whose last hope of remaining at home dies when her mother passes away and faced with a distasteful marriage, is propelled by an old groom and her governess to take the secreted Channing jewels and run away to London. They do so when the governess, an incredibly creative, intrepid lady of an endless supply of resourceful ideas, suggests that she becomes a foreign nobility.
And so Felicity emerges soon as the Princess of Brasnia and all of London is taken by storm, as there was no internet back in the day. There is a slight mishap as by this time, Lord Bellamy had gotten himself engaged, but finds himself embroiled in Felicity's deception as well as being drawn to her. The romance here was done fairly well, as you can see their interactions from back when she was dressed as a boy and then herself as a very feisty Felicity. I can definitely see why he would be drawn to her in an era where you don't delve beneath the surface too deeply. Moreover, there was less of the heaving sexual drive that seemed to be what passed for love for some of Marion Chesney's heroes. And of course, it helped that the hero wasn't dumb enough to be clueless to the whole deception or to continue to be engaged like a wimp.