In William Richards Castle Jr, the viewer sees a well-dressed young man seated against a muted background. The artist uses a palette of warm earth tones, with soft highlights that bring out the subject's features. The figure is portrayed with a confident expression, showcasing a sense of poise and dignity.

The overall composition emphasizes the subject's importance and character. This painting is executed in oil on canvas, a medium that allows for rich color and texture. The dimensions are approximately 76 x 102 cm, making it a sizable portrait that commands attention. The brushwork is detailed yet smooth, typical of Philip Alexius de László's realistic style.

The artist's technique captures the nuances of light and shadow, enhancing the three-dimensionality of the figure. Philip Alexius de László was known for his portraits of prominent figures in the early 20th century. This work, created around the 1910s, reflects his ability to convey personality through meticulous detail. An interesting fact about this painting is that it was commissioned by Castle's family, highlighting the social status and significance of the subject.

De László's portraits often aimed to immortalize the essence of his sitters, making this piece a notable example of his work.