This gown is made from the J.P. Ryan Robe L'Anglaise (English Gown) pattern. The petticoat is made using this tutorial which is my standard petticoat method.
I decided to add boning to the center back which was an optional thing in the pattern. I think it helps the back to lie more smoothly. I just ripped out a little of the stitching that secured the lining to the bodice, ran running stitches in the lining catching the seam allowance to make the boning channels and slipped in two 18 inch pieces of steel boning. Then I stitched the neckline back up.
As far as the upgrades go--First I added ruched trim around the neckline. I cut strips 1 3/4 inches wide with a rotary cutter then trimmed them with pinking shears. I decided to do the gathering and attaching in one step. Basically I did this by tacking down the end, taking 3 running stitches on the trim alone, pulling them tight then taking a back stitch through the trim and bodice to anchor it. I did this around the neck. I didn't know how much trim I would need so I just seamed it together as I went along.
I decided to make a nice pearl bracelet to wear since I was going to be dressed up.
I made a little hair ornament with silk ribbon and small ostrich feathers which I pinned in my wig. The gown was worn over the matching petticoat, a medium weight linen petticoat, traditional linen 18th century shift, J.P. Ryan strapless stays, silk clocked stockings and white Dunmore shoes by the American Duchess. I also pinned a silk ribbon bow to the neckline. The wig is The Duchess by The Historical Hairdresser and the jewelry, which includes the bracelet, a lover's eye pendant and pearl and crystal drop earrings were made by yours truly.