I found this personal add among my father-in-laws antiques. It’s from the “Morning Post,” 1775.
A Lady of independent Fortune and liberal Sentiments would be glad if, in procuring to herself an agreeable Companion she could at the same time relieve from Distress, and perhaps prevent from utter Ruin, some still deserving although unfortunate fair one; for she can make allowance for the frailty of her own Sex, and knows the base arts of the other; in a word, a single faux pas will be no objection, provided there remain a virtuous Disposition, and that the person wanted be good-natured, affable, and sincere in the account she may give of herself, which for that purpose may at first be anonymous. She must also possess the usual accomplishments required by a good Education; know something of Music, have an agreeable Voice, and a genteel Person, not under twenty nor above the age of twenty-five years. Such as come within this description may apply by letter to B. D. at the York Coffee House, St Jame’s Street, and the apparently most deserving will be enquired after. No kept Mistress or lady of Pleasure need apply.