I was lucky to have studied with Charles in two different week long seminars at Fort Collins CO in the 1980s He was the most giving and demanding instructor. One weeklong class we all made a bias skirt and I choose rag silk fabric that frayed terribly with his OK. Charles just said underline and hand overcast. And when overcasting didn't work going one direction he just said now do it again going the opposite direction. He was doubtful of my doing welt pockets which the skirt called for but I did using my way (Threads #92 Softly Tailored One Seam Pants) and they worked just fine. I still wear the skirt with his autograph on the muslin underling. His comment was "Now that is a skirt and it deserves a jacket". I learned SO MUCH from him about BIAS and teaching sewing and fashion and shared my knowledge with my students. He will be missed.
Shirley L. Smith