I have three books by Helen Van Wyk and have been reading them and studying how she did her still life paintings.  I use to watch her on PBS Channel 13 years ago.  She is deceased but still has her books out for purchase. 

She did quite a lot of still life paintings as well as portraits.  She discussed how she did her portraits on some of the shows on PBS years ago.  She also explained how she did her still life paintings and setting them up and then doing the underpainting.  I did enjoy watching her and learning from her.