This is a detailed black and white engraving depicting a monstrous, demonic creature. It's a classic depiction of a nightmare or incubus/succubus, likely from a 19th-century source. The creature is humanoid in form, but grotesquely distorted. It's squatting or crouching, with large, clawed feet. Its body is muscular and somewhat hunched. The head is particularly striking, with a long, hooked nose, wide, staring eyes, and a gaping mouth filled with sharp teeth. It has small horns protruding from its head. A smaller, ghostly figure is perched on its back, seemingly clinging to it. This figure is also humanoid, but more ethereal and indistinct. The creature's body is covered in dense, swirling lines, creating a sense of texture and movement. The overall effect is unsettling and nightmarish. The style is reminiscent of woodcut or engraving, with a focus on strong lines and dramatic shading. The image is signed with the name 'J. Accault' and 'L.B.' at the bottom.