Unidentified Sketch, Curvilinear in Form (from Whistler Album)

The image shows a pencil sketch of a curvilinear form. The drawing is on white paper, with a black border around it. The sketch depicts a curvilinear shape with a pointed end on the left and a spiral on the right. The left side of the shape has several lines that curve and intersect. The shape has a long, thin extension on the left. The right side of the shape curls into a spiral. The background of the paper is plain and light gray. A small piece of paper with handwritten numbers is on the right edge of the image. The image is in black and white.