She founded the National Chamber Music Course, a summer school for young string players, in 1974, and has managed it since.
[8] In 1992, she was the pianist in the world premiere of the Chamber Concerto V by Elliott Schwartz in Amsterdam, with her husband as the bassoonist and the Utrecht String Quartet.
[10] After her husband died unexpectedly in 2007, Elisabeth Waterhouse encouraged James B. Kopp to proceed with writing a book which William had asked him to co-author for Yale University Press.
"[12] Waterhouse initiated a memorial concert for her husband close to what would have been his 80th birthday, held on 16 April 2011 at Wigmore Hall and titled The Proud Bassoon.
Among the players were their children, Gervase de Peyer and Timothy Brown as former members of the Melos Ensemble, players who succeeded him such as Roger Birnstingl (Orchestre de la Suisse Romande) and Julie Price (BBC Symphony Orchestra), bassoonists from around the world, such as Jim Kopp, Lyndon Watts and Takashi Yamakami, his students and a bassoon quartet from the RNCM, led by Stefano Canuti.