Question: What town is closest to the castle once owned by the Scottish inventor who invented a military cannon described by Isaac Newton as "destructive to the human species"?

Context articles: Kinnairdy Castle
Newton polynomial
Statal Institute of Higher Education Isaac Newton
Isaac Newton Group of Telescopes
Isaac Newton Institute
David Gregory (physician)
Nicolas Fatio de Duillier
Jean Claude Jacob
Turing Gateway to Mathematics
Gregorian telescope

Kinnairdy Castle is a tower house, having five storeys and a garret, two miles south of Aberchirder, Aberdeenshire, Scotland.
 The alternative name is Old Kinnairdy.
In the mathematical field of numerical analysis, a Newton polynomial, named after its inventor Isaac Newton, is an interpolation polynomial for a given set of data points.
 The Newton polynomial is sometimes called Newton's divided differences interpolation polynomial because the coefficients of the polynomial are calculated using divided differences.
The Statal Institute of Higher Education Isaac Newton (Italian: Istituto Statale di Istruzione Superiore Isaac Newton) is an Italian secondary school in the city of Varese.
 It is a technical-professional school.
 It assumed the current name in 2007, with the union of the Technical Industrial School of Varese (ITIS) and the Professional Institute of State for Industry and Handicrafts of Varese (IPSIA).
 It is located in Casbeno, in Via Gianluigi Zucchi.
The Isaac Newton Group of Telescopes or ING operates the William Herschel Telescope, Isaac Newton Telescope and Jacobus Kapteyn Telescope optical telescopes for the Science and Technology Facilities Council (STFC), the NWO and the IAC.
 The telescopes are located at Roque de los Muchachos Observatory on La Palma in the Canary Islands.
The Isaac Newton Institute for Mathematical Sciences is an international research institute for mathematics and its many applications at the University of Cambridge.
 It is named after one of the university's most illustrious figures, the mathematician and natural philosopher Sir Isaac Newton and occupies
David Gregory (20 December 1625 – 1720) was a Scottish physician and inventor.
 His surname is sometimes spelt as Gregorie, the original Scottish spelling.
 He inherited Kinnairdy Castle in 1664.
 Three of his twenty-nine children became mathematics professors.
 He is credited with inventing a military cannon that Isaac Newton described as "being destructive to the human species".
 Copies and details of the model no longer exist.
 Gregory's use of a barometer to predict farming-related weather conditions led him to be accused of witchcraft by Presbyterian ministers from Aberdeen, although he was never convicted.
Nicolas Fatio de Duillier {'1': ", '2': ", '3': ", '4': "} (also spelled Faccio or Facio; 16 February 1664 – 12 May 1753) was a Swiss-born mathematician, natural philosopher, and inventor.
 He spent much of his adult life in England and Holland.
 Fatio is known for his work on the zodiacal light problem in astronomy, for originating the "push" or "shadow" theory of gravitation, for his close association with both Christiaan Huygens and Isaac Newton, and for his role in the Newton v. Leibniz calculus controversy.
 He also invented and developed the first method for fabricating jewel bearings for mechanical watches and clocks.
Jean Claude Jacob was a serf from the Jura Mountains, supposedly 120 years old, who was brought from his native place to figure as "dean of the human race" in Paris at the Festival of the Federation of July 1790.
 Thomas Carlyle wrote of Jacob in :Having seen the Human Species itself, to have seen the 'Dean of the Human Species,' ceased now to be a miracle.
 Such 'Doyen du Genre Humain, Eldest of Men,' had shewn himself there, in these weeks: Jean Claude Jacob, a born Serf, deputed from his native Jura Mountains to thank the National Assembly for enfranchising them.
 On his bleached worn face are ploughed the furrowings of one hundred and twenty years.
 He has heard dim patois-talk, of immortal Grand-Monarch victories; of a burnt Palatinate, as he toiled and moiled to make a little speck of this Earth greener; of Cevennes Dragoonings; of Marlborough going to the war.
 Four generations have bloomed out, and loved and hated, and rustled off: he was forty-six when Louis Fourteenth died.
 The Assembly, as one man, spontaneously rose, and did reverence to the Eldest of the World; old Jean is to take seance among them, honourably, with covered head.
 He gazes feebly there, with his old eyes, on that new wonder-scene; dreamlike to him, and uncertain, wavering amid fragments of old memories and dreams.
 For Time is all growing unsubstantial, dreamlike; Jean's eyes and mind are weary, and about to close, — and open on a far other wonder-scene, which shall be real.
 Patriot Subscription, Royal Pension was got for him, and he returned home glad; but in two months more he left it all, and went on his unknown way.
The Turing Gateway to Mathematics (TGM) is an Impact Initiative at the University of Cambridge in the UK.
 As a knowledge intermediary for the mathematical sciences, it is overseen by the Isaac Newton Institute (INI) at the Centre for Mathematical Sciences (CMS) adjacent to the Isaac Newton Institute.
 The Turing Gateway to Mathematics is an intermediary for knowledge exchange for both professional and academic users of mathematics.
 Each year the TGM organizes multiple events and workshops that feature expert speakers from various industries, governments and scientific organisations that discuss mathematical technical and models, presented by leaders from diverse backgrounds, such as the health care and finances.
The Gregorian telescope is a type of reflecting telescope designed by Scottish mathematician and astronomer James Gregory in the 17th century, and first built in 1673 by Robert Hooke.
 James Gregory was a contemporary of Isaac Newton, both often worked simultaneously on similar projects.
 Gregory's design was published in 1663 and pre-dates the first practical reflecting telescope, the Newtonian telescope, built by Sir Isaac Newton in 1668.
 However, Gregory's design was only a theoretical description and he never actually constructed the telescope.
 It was not successfully built until five years after Newton's first reflecting telescope.