There are many valuable resources that every voice teacher should know: the writings of the Lampertis, García, Stockhausen, and of course, Cornelius Reid." Research and teaching  In the 1940s Cornelius Reid was a pioneer in the research into the writings of singers and teachers (17th to 19th century) on early vocal techniques. This led him to write seven books and many articles on singing and bel canto. He taught voice in New York City for almost seventy five years, teaching until shortly before his 97th birthday. Many of his students have become well-known singers and voice teachers. He was invited to give many master classes in North America, Europe, as well as in Japan and Australia. His teaching has had influence on the teaching of singing in North America, Europe and Asia. Several cities in Germany offered 1- and 2-week master classes with him for up to eight years. His influence in Germany can easily be seen in the German version of Wikipedia: see the article: "Gesangsregister". Criticism  Reid and others who have written about bel canto in the modern period, have inevitably been going against the mainstream and thus have always been open to criticism. Pedro de Alcantara, an Alexander teacher, supports both Reid as well as Husler/Rodd-Marling, who published "Singing: The Physical Nature of the Vocal Organ" in 1965: "The free-thinking Reid and the collaborating duo of Frederick Husler and Yvonne Rodd-Marling have put forth watertight arguments for the correct relationship of cause and effect as regards breathing and singing. Their books have proved highly controversial, yet their detractors, rather than disproving the points made by their writers, have resorted to "ad hominem" attacks such as 'He is crazy.' Alexander was fond of saying that 'it doesn't alter a fact because you can't feel it'. We can expand the dictum to say that it does not alter a fact because you cannot understand it, nor because you can not accept it." When Reid's first three books were published as a Trilogy in 1975, Richard Dyer-Bennet wrote: "Today's world, in all its aspects, seems to vacillate between mechanistic and mystical approaches to problems. As always, the true path lies somewhere between the extremes, and Reid indicates the path. Due partly to misinterpretation and partly simply to neglect, contemporary teachers have deserted the old, productive principles of "bel canto". As author and teacher, Reid has now firmly re-established these principles and, with added insights of his own, leaves us with no excuse to again lose our way."