Sources

• Accounts of John Legay, fundraiser for the Queen of Sicily, the manuscript of the library of Angers, published in the History Anjou in 1900.

• King Lecoy by René de la Marche.

• Conduct of King René J. Levron.

• Histoire de Charles VII by Vallet of Viriville.

• Queen Jeanne. Jeanne de Laval. Second wife of King René.Pierre Le Roy
  Pierre Le Roy
  Pierre Le Roy was a French clockmaker. He was the inventor of the detent escapement, the temperature-compensated balance and the isochronous balance spring. His developments are considered as the foundation of the modern chronometer...
  
  . Regional editions of the West.