Excerpt:
Archives
Difference Engine No.1 Surviving Archives and Other Sources Archives List
History by C.J.D. Roberts History of Difference Engine No. 1
Origin of Motion Charts for DE1 Origin of Motion Chart for DE1
On the Mathematics of Babbage's First Difference Engine Method of Differences
Benjamin Herschel Babbage's Manual to operate Difference Engine BH Babbage Manual
Marshall's Description of the operation of the 1832 Fragment Difference Engine
Babbage's Difference Engine: How it was intended to work
Analysis of the Expenditure on Babbage's Difference Engine No.1
Letters from the Bromhead Collection
Letters etc. form the Forbes Collection
Croker Papers
Baron de Prony's Description of the Construction of Tables by the Method of Diffferences
Various Pictures of Babbage
Various Pictures and Graphics
Maps and Plans