Event Comment: Author's Day. [Publication of the play announced in the Public Advertiser this day, along with the following "puff" by Censor Dramaticus: "Sir: I have just given the new comedy, the Double Mistake, its first reading, and must confess I never was better pleased at a first reading than at present: It is chaste, sententious and genteel in its dialogue, interesting in its plot, the characters all of consequence, strongly marked and happily kept up, and even the virtuoso entertaining without being tiresome. I heartily wish it success, and congratulate the author on such a production, which shows that virtuous principles in high life render the persons that possess them doubly charming, and add real grace and dignity to their appearance in public life....I hope I may be believed when I say I have not the most distant knowledge of the author, and that impartiality shall ever be, and ever was my constant plan in observations of this kind."