An Officer on Horseback 

"An Officer on Horseback" is a dynamic sketch by Joshua Reynolds, one of the most celebrated British portrait painters of the 18th century. The composition depicts a rider on horseback, charging forward with a determined expression and a flowing cape. The loosely rendered details, including a glimpse of a fleeing figure in the background, suggest a moment of action, creating a sense of urgency. This sketch showcases Reynolds' skill in capturing movement and conveying emotion through expressive brushwork.