The Hamlet on the Ramparts website is an attempt to involve a wide range of libraries, publishers, and scholars in a joint project in which all possible resources for a single scene of Hamlet are freely available on the Web in an archival system designed to make all resources easily accessible. It is an experiment in bringing together in digital form resources which are held in geographically distant locations and making them available for use by students and scholars at all levels, and by anyone with an interest in Shakespeare. http://shea.mit.edu/ramparts
An example of a promptbook edition. Forrest's Hamlet Promptbook (1860) contains many interesting handwritten notes along side the text which gives a glimpse of how the stage was arranged and what lines may have been omitted during a production at the time.