Other
The Aria Database
The searchable Aria Database features over 1,200 arias from 170 operas by 60 composers. It includes lyrics, translations, synopses of operas, and MIDI files.
British Library
British Library: Discovering Literature: John Gay
Familiarize yourself with the life and works of John Gay. This source contains a quick fact sheet, a short biography, links to related articles, collection items, and works.