Little Arthur is a portrait that captures a young boy with a thoughtful expression. The color palette is soft, featuring warm tones that create a gentle atmosphere. The boy is dressed in period clothing, which adds to the historical context of the painting.

The background is simple and unobtrusive, allowing the viewer to focus on the child's face and demeanor. The painting is executed in oil on canvas, a medium that allows for rich color and texture. Whistler's technique showcases his skill in blending colors to create depth and dimension. The brushwork is delicate, particularly in the rendering of the boy's facial features and clothing.

This attention to detail enhances the realism of the portrait. James Abbott McNeill Whistler was an influential American artist known for his contributions to the Realism movement. Little Arthur is notable for its intimate portrayal of childhood, reflecting Whistler's interest in capturing the essence of his subjects. Interestingly, this work is part of a series of portraits that Whistler created of children, highlighting his fascination with youth and innocence.

The painting is currently housed in the Museum of Fine Arts Boston.