The public are respectfully informed that Miss Duncan having with difficulty postponed her summer engagements, to enable her to remain a week longer in Bath, will perform for the benefit of Mr. & Mrs. Egan, on Saturday next, July 4th, 1812 ... when will be presented, Murphy's celebrated comedy of Know your own mind ... : to which will be added, a favorite farce, called Of age to-morrow ... and a celebrated mock bravura song, by Miss DuncanTheatre Royal (Bath, England)[1812]engCaption title.A playbill.