Walnut trees, sunset effect—first days of october

Walnut Trees, Sunset Effect—First Days of October belongs to Sisley's sustained engagement with the specific quality of autumnal light along the Loing, a subject he returned to repeatedly in the 1880s and 1890s. The title's specificity—'first days of October'—reflects his interest in capturing a particular seasonal moment rather than an abstract autumn effect. Walnut trees, whose foliage turns from green to yellow-brown in October, were a common presence in the French agricultural landscape and gave him a specific warm palette. The sunset light further saturated the autumn colors, producing the warm, golden atmosphere that distinguishes these late season works from his cooler spring and summer paintings.

The golden-yellow walnut foliage is built from short, varied strokes of warm ochre, yellow, and rust-brown. The low-angle sunset light rakes across the composition from the side, creating strong lateral shadows that give the scene dramatic three-dimensionality unusual in Sisley's typically even-lit work. The sky in sunset conditions takes on warm pinks and oranges that Sisley renders in broad horizontal strokes above the tree line.