Stonehenge General View from East No.207 Magic Lantern Slide marketed by McALLISTER 49 Nassau Street New York carrying the GWW initials was reproduced from a stereoscopic image taken by G.W.Wilson of Aberdeen in 1871.

3.25 by 4 inch "French pattern" Magic Lantern Slide

Note: A signed and dated image #209a from this series is the earliest photograph I have come across showing the movement of leaning the Bluestone.