I really enjoyed the opportunity to participate in the Winterthur SAPFM Furniture Program. Thanks to all who made it possible. In the Selected Objects Study, one of the pieces was a Philadelphia Queen Anne arm chair. Where the arm and the back post meet, a through mortise and tenon joint was used. That has to be the most difficult joint in all of period furniture making IMHO. I have done a blind mortise at this joint and it is hard enough. Maybe someday I will attempt this joint.