For further information about the history of anaesthesia, visit these websites

The History of Anaesthesia Society was founded in 1986 and is based in the UK. The proceedings of every meeting they have held are published on this website, along with many other interesting pieces of information about the history of anaesthesia.
http://www.histansoc.org.uk/about-the-society.html

The Anesthesia History Association was founded in 1982 and is based in the United States. Their website also contains the published proceedings of all their meetings as well as other information about the history of anaesthesia.
http://ahahq.org/index.php

The Wood Library Museum in Park Ridge Illinois is a comprehensive collection of archival material, rare books and anaesthetic equipment. They offer a Fellowship program to assist researchers.

The history of anaesthesia from a French perspective can be found at Histoire de L'Anesthésie et de la Réanimation
http://www.histanestrea-france.org/SITE/index.php

Every four years an International Symposium on the History of Anaesthesia is held somewhere in the world. The proceedings of these meetings are always published in a book and these volumes provide a great variety of information on the history of anaesthesia. The last meeting was held in Sydney in January 2013 and details of this meeting can be found at www.isha2013.com