- Heilles, c. 875 known as the Hilgia is a village of 575 acres at the intersection of roads Hermes Mouy and Noailles in Clermont, at the western boundary between Saint-Felix in the northeast and to Mouy east. The road to great hiking Paris-Lille by Meru (GR 225) crosses. The territory jutting into the valley to the edge of Thérain and extends southward on the plateau de Monchy-le-Chatel; populated places are located on the wooded slopes of the plateau and a ravine separating the territory of that of Mouy another ravine descending Mouchy occupies the western region, it is in the capital, consisting of several streets, was built and it now contains around 150 houses. This town of 593 inhabitants today, which is attached to the hamlet of Mouchy-la-Ville, has retained its rural character because it is surrounded by meadows, fields and woods cover half of its territory. Farming was his vocation.
- Formerly Heilles depended on the barony of Mouchy-le-Chatel, Canton de Noailles and the treatment, under the title of St. Martin, was conferred by the Chapter of Saint-Michel Beauvais. Mouchy-la-Ville or formerly Moncy hamlet in the valley, almost a hundred houses. This place, which was the parish Mouy had a chapel built in 1533, now defunct. The mill of the Isle is another gap to the north boundary of Heilles. Hautemaison, away to the coast south of Mouchy-la-Ville, never more than 4 houses and is completely destroyed.
- A Mouchy-la-Ville is a plaque commemorating the birth in the town of Nicolas Fortin, a scientist who created the barometer of precision and participated in the development, under the Convention, the metric system, as originally standards maintained in the Pavilion of Weights and Measures Breteuil, Sevres (1750-1831). His last descendant, Fortin-Hermann, has donated 90 000 F or the Commune. The interests of the offering were used to maintain the Common tomb of his ancestor cemetery, on the one hand and rewarding year for the top two male students and the best female students and to assist potential Students wishing to pursue higher education, other. Today, the perpetual endowment does not report anything (it is unknown what became of her) but the city continues to watch over the tomb of its most illustrious citizen.
- The municipal cadastre is a place called "The Fountain St. Clair" deaf where a trickle of water that tradition ensures that its applications on the eyes to heal blindness.
- On Mouy limits Heilles separation, are the remains of the now inhabited Cistercian abbey Saint-Jean-des-Viviers, whose farming freshwater fish fed the table of the Sun King. The ponds have disappeared. This abbey was sold as national property during the revolution, the purchaser has used as a quarry and has destroyed the chapel. The entire building is Gothic.
- The Mayors of Heilles Pluviose (February) 11th year (1803) to the year 2009:
- Pluviose year 11th year: Peter Morisos.
- December 1815: Jean-Baptiste Watigny.
- June 1837: Lucien Dubus.
- August 1848: Michael Victor Milliere.
- October 1852: Jean-Baptiste Watigny.
- November 1853: Michel Victor Milliere.
- August 1855: Alexandre Pillon.
- September 1860: Louis Alexandre Pillon.
- January 1881: Stephen Monmarte.
- May 1882: Denis Flamant.
- November 1886: Alexandre Lefevre.
- May 1888: Desire Borde.
- May 1892: Des Noyelles Desire.
- May 1904: Charles Augustus Flamant.
- October 1929: Maurice Thierry.
- December 1932: Leonce Chartron.
- November 1935: Ernest Lemaire.
- April 1945: Leon Borde.
- December 1950: Victor Hubert Clément Barbier.
- 1953: Pierre Marchand Martin.
- 1977: Serge Bensse.
- November 1981: Claude Ogez.
- March 2008 to date: Christian Van Parys.