A SINGLE Gentleman of Fortune, who lives in a genteel private style, is desirous of meeting with an agreeable genteel young Lady, of from 20 to 30 years of age, not older, to superintend and take upon her the management of his House and Servants, for which she will be complimented with board, &c. As the situation will be quite genteel, it will not suit any but such who has had a liberal Education, and who has some independance of her own, so as to enable her always to appear very genteel, and as a relation or particular friend, in which character she will always be esteemed, and have every respect paid her, so as to render the situation and every thing else as agreeable as possible. Any lady inclining to the above, will please to direct with name and address, to M. H., Esq., to be left at No. 7, the Bookseller’s, in Great Newport Street, near St Martin’s Lane; she will be waited on, or wrote to, but with the greatest delicacy, and every degree of strict honour and secrecy. Strict honour and secrecy seems to be an essential to the successful completion of the designs of many advertisers of this time, but they are to be all on one side, in company with an amount of blind credulity which would be wonderful if it were not repeatedly exhibited in modern days. Here is an honourable and secret venture which appears in the _Morning Post_ of December 17, 1779, and which was doubtless very successful:-- A GENTLEMAN who knows a Method which reduces it almost to a certainty to obtain a very considerable sum, by insuring of Numbers in the Lottery, is advised by his Friends to offer to communicate it to those who wish to speculate in that Way. The advantage that is procured by proceeding according to his Principles and Directions, will be plainly demonstrated and made perfectly evident to any who chuses to be informed of it. The terms are Ten Guineas each person, and they must engage not to discover the plan for the space of eighteen months. If those who are willing to agree to the above terms will be pleased to address a line to J. R. C. at the Union Coffee-House, Cornhill, or the York Coffee House, St James’s Street, they will be immediately informed where to apply. Those who have lost money already (by laying it out improperly) insuring of Numbers, may soon be convinced how much it will be to their advantage to apply as above. _N.B._--This advertisement will be inserted in this morning’s Paper only. A suspicious person would have fancied that the friends of J. R. C., unless they were dissimilar from other friends, would have used the information for their own benefit--but generous and self-abnegating people do turn up in history in the most unexpected and unaccountable ways. Another specimen of the secret and honourable kind, though in it the secrecy and honour have to be on the side of the advertiser, follows. It is in the _Morning Post_, April 18, 1780, and runs thus:--