From the Pottsgrove Manor Fb page:
Janea Whitacre, Mistress Milliner and Mantua-maker in the Department of Historic Trades at the Colonial Williamsburg Foundation, will lead a workshop on draping an English-style gown using 18th-century techniques. By the end of the weekend, participants will have a gown partially constructed and the knowledge to complete it on their own.
Ages 14 and up; fee: $150 per person for the weekend (includes Sat. & Sun. lunches; fabric & notions not included). Participants should have experience in hand sewing and garment construction and should have a shift, under-petticoat, and a well-fitted pair of stays. Class size is limited to 16; registration & payment required by March 28th.