The image shows a bust-length portrait of a man identified as Major Generall Lambert. He is facing slightly to the left, with upright posture, wavy shoulder-length hair, and a prominent facial structure. He is wearing 17th-century armor with intricate rivet details and a lace ruff around his neck. The background is plain and monochromatic, creating a vignette effect that emphasizes the figure. An inscription below the portrait reads "Major Generall Lambert."