PAPER INSTRUMENT – MARTIN, Benjamin. A View of the Solar System and Orbit of the Comet with its proper Elevation. London: 1757. Engraved broadside (plate mark 255 x 372mm) showing the probable transit of Halley's Comet for 1758, with three-dimensional flap to illustrate the perihelion, complete with all comet cut-outs. (Folded, one comet cut-out slightly loose but holding.) Edmond Halley, in his 1705 Synopsis of the Astronomy of Comets, used Newton's laws to calculate the effects of the gravitational pull of Jupiter and Saturn on cometary bodies. He concluded that the comet of 1682 was the same as those observed by Petrus Apianus in 1531 and Johannes Kepler in 1607), returning every 76 years. Halley correctly predicted its return for 1758, although it was not spotted until 25 December 1758, and did not pass through its perihelion until 13 March 1759 on account of the gravitational pull of Jupiter and Saturn.