This period was of great importance, resulting in the artist's first mature paintings. (delart.org)
I made a lot of hard edge paintings during that time and by the Fall of 1965 I finished a series of drawings of my next and really first series of mature paintings. (ronnielandfield.com)
One recent Pollock biography recounts a primal scene in which the infant Jackson watches his father standing on the rock above him, urinate spectacularly, an experience which informed hia mature painting style. (michaelstubbs.org)