This is a black and white illustration, likely from a book, depicting a scene of a girl swimming alongside a large mouse in water. The style is reminiscent of 19th-century pen and ink drawings, with detailed cross-hatching to create texture and shading. The girl is shown swimming on her back, with her head turned towards the mouse. Her hair is short and flowing, and she appears to be wearing a dress or garment that is partially submerged in the water. Her expression is not clearly visible, but she seems to be looking at the mouse with curiosity. The mouse is much larger than a typical mouse, almost the size of a small dog. It is walking on the surface of the water, seemingly without sinking. It has a long tail and whiskers, and its fur is depicted with detailed cross-hatching. The mouse is looking towards the girl, and there is a sense of interaction between the two. The water is depicted with horizontal lines, creating a sense of movement and texture. The background is plain, and the focus is entirely on the girl and the mouse. The illustration is framed by a simple rectangular border. The overall impression is one of whimsy and fantasy, reminiscent of scenes from 'Alice's Adventures in Wonderland'. The unusual size of the mouse and the fact that it is walking on water contribute to the surreal and dreamlike quality of the image.