A full-length portrait by Sir Joshua Reynolds depicting Captain George K. H. Coussmaker with his horse in a natural setting.

Sir Joshua Reynolds, the first president of the Royal Academy, painted this full-length portrait of Captain George K. H. Coussmaker in 1782. The work depicts the officer in his military uniform, leaning against a large tree with his horse positioned beside him. This composition reflects the conventions of eighteenth-century British portraiture, where the subject is often placed in an outdoor setting to convey status and ease.

Reynolds employs a painterly technique, visible in the handling of the horse's mane and the foliage above. The red of the captain's coat provides a visual anchor for the composition, contrasting with the muted tones of the background and the dark coat of the horse. The light falls across the subject, drawing attention to his posture and the textures of his attire. The inclusion of the horse serves to suggest the subject's lifestyle and interests, a common practice in aristocratic portraiture of the period.

This painting is held in the collection of the Metropolitan Museum of Art. It demonstrates Reynolds's ability to balance formal requirements with a sense of individual character. The brushwork remains fluid, particularly in the treatment of the sky and the horse's features, which softens the overall appearance of the scene. The portrait captures a moment of repose, moving away from the rigid poses often found in earlier military depictions. By integrating the figure with the natural environment, Reynolds creates a cohesive image that prioritises harmony between the subject and his surroundings. The work remains a clear example of the artist's approach to portraiture during the height of his career in London.