Painted in 1975, "Less on Lesson No. 14" presents a characteristically precise arrangement of geometric forms in oil on linen, demonstrating Frederick Hammersley's command of hard-edge abstraction at a moment when his practice had reached full maturity. The square format, measuring 61 by 61 centimeters, is not incidental but integral to the work's logic, with the canvas shape participating actively in the compositional relationships Hammersley constructs within it. His signature wit surfaces even in the title, which performs a kind of visual pun, folding the word "lesson" into a meditation on reduction and restraint as formal principles. Hammersley occupies a singular position within the Los Angeles hard-edge movement, counted alongside Karl Benjamin, Lorser Feitelson, and John McLaughlin as one of the four painters whose 1959 exhibition at the Pasadena Art Museum defined a distinctly Californian strain of geometric abstraction. Unlike the cooler impersonality sometimes associated with that tendency, his work retains a handmade warmth, and the oil on linen surface of this painting rewards close attention, carrying subtle evidence of the artist's direct engagement with his materials. The careful rendering and signed condition of the work speak to the personal investment Hammersley brought to each canvas. Presented framed and in excellent condition through Addison Rowe Gallery, "Less on Lesson No. 14" offers collectors a focused and intellectually playful example of Hammersley's geometric work from a critically significant decade in his career. Works from this period are increasingly sought as institutional and scholarly interest in the West Coast hard-edge tradition continues to grow, and this small, resolved canvas carries the full weight of his thinking in an accessible scale suited to a range of collecting contexts.