Mushure mekutsvaga kwenguva refu muzhizha ra1773, Mason akataura kuti munhu akanakisisa aifanira kuedza kuedza kwacho aiva Nevil Maskelyne, Astronomer Royal. Akaratidza kuti kuedza kwacho kwaizokudza "nyika kwayakagadzirwa" uye yakapa Whernside muYorkshire, kana Blencathra-Skiddaw massif muCumberland sechinangwa chakakodzera. Royal Society yakaumba Komiti yeKukwezva kuti iongorore nyaya yacho, ichigadza Maskelyne, Joseph Banks naBenjamin Franklin pakati pemitezo yayo. Komiti yakatumira nyanzvi yezvemuchadenga naCharles Mason kuti vawane gomo rakakodzera.
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