Mervyn Herbert Nevil Story Maskelyne was an English geologist and politician.
Portrait of Neville Story-Maskelyne taken by Henry Fox Talbot
Nevil Maskelyne was the fifth British Astronomer Royal. He held the office from 1765 to 1811. He was the first person to scientifically measure the mass of the planet Earth. He created The Nautical Almanac, in full the British Nautical Almanac and Astronomical Ephemeris for the Meridian of the Royal Observatory at Greenwich using Tobias Mayer's corrections for Euler's Lunar Theory tables.
Nevil Maskelyne
Maskelyne's tomb in Purton, Wiltshire
Tables requisite to be used with the astronomical and nautical ephemeris for finding the latitude and longitude at sea, 1781