I just finished a book called Alla Prima by Al Gury on "traditional direct painting." He illustrates two artists of interest to me: Jon Redmond, and Tom Thomson. Thomson was a Candadian artist, who died young (1917). Self-taught, he spent only five years painting wilderness landscapes in Ontario basically out of a cigar box and a canoe. All his paintings are small, and they number in the hundreds, and, judging from the reproductions I have seen, they are fabulous. You can google both these artists to see their work. I will have more to say about Thomson in the future.