List of variables, their signs and coefficients
Catalogue of the drawings of the New Analytical Engine.
Catalogue of 386 notations with their classification.
Analytical Engine Plan 28. Scale 1/6. Draft.
Notation of the reduction of the three equations. Successive reductions of three simultaneous equations in three variables to find the value of one variable
Solution of a single linear equation and reduction of two simultaneous equations in two variables to two independent linear equations
Reduction of three simultaneous equations in three variables to two simultaneous equations in two variables
Reduction of three simultaneous equations in three variables to two simultaneous equations in two variables
Tabulation of a quadratic by differences
My Machine 1888 II Plan of driving cams, levers, etc. in initial position.
My Machine 1889 III Development of driving cams.
First of the six 'Universal Tool' sheets.
Continuation of sheet T/1/2. Second Edition.
Plan of part of framing of Drawing 161. Tracing of BAB A/161.
Part of framing shown on 160. Tracing of BAB A/160.
Elevation of part of framing of Drawing 160.
Rough notes and sketches, including drawings of Babbage's game 'Tit Tat Toe'.
Principles to be followed in the description of the constituent portions of the Analytical Engine.
Sheet 1. Successive reduction of three simultaneous equations in three variables to find the solution for one variable.
Sheet 2. Successive reduction of five simultaneous equations in five variables to find the solution for one variable.
Letter from George Stephenson, Newcastle to Timothy Hackworth, Darlington
Drawing of St. Petersburg Railway Locomotive
Letter from Timothy Hackworth to Liverpool and Manchester Railway Board
Cross-written letter from Prudence Hackworth, Albion House to Thomas Greener
Envelope from an unknown sender in Darlington to Jane Young (nee Hackworth), Soho Cottage, Shildon
Cross-written letter from Timothy Hackworth (Jn) to Jane Young (nee Hackworth)
Cross-written letter and envelope from Hannah Smith, Albion House, Penrith to Jane Young (nee Hackworth), Vilvorde, Belgium
Cross-written letter and envelope from Prudence Nightingale (nee Hackworth), Albion House, Penrith to Jane Young (nee Hackworth), Vilvorde, Belgium
Cross-written letter from Eliza Greenhalgh and Cecile Margin, Vilvorde, Belgium to Jane Young (nee Hackworth)
Cross-written letter from Prudence Nightingale (nee Hackworth), Penrith to Jane Young (nee Hackworth), Vilvorde, Belgium
Fragment of cross-written letter and envelope from Prudence Nightingale (nee Hackworth) to Jane Young (nee Hackworth)
Cross-written letter and envelope from Prudence Nightingale (nee Hackworth), Albion House, Penrith to Jane Young (nee Hackworth), Vilvorde, Belgium
Cross-written letter from Eliza Greenhalgh and Cecile Margin, Vilvorde to Jane Young (nee Hackworth)
Cross-written letter from Miss Smith to Jane Young (nee Hackworth), Vilvorde, Belgium
Cross-written letter and envelope from Prudence Nightingale (nee Hackworth), Penrith to Jane Young (nee Hackworth), Vilvorde, Belgium
Cross-written letter from Elizabeth Dove, Leeds to Prudence Nightingale (nee Hackworth), Darlington
Pages 8 and 9 of John Graham's report book 1835-1838
Pages 14 and 15 of John Graham's report book 1835-1838
Second front flyleaf and page 1 of John Graham's report book 1835-1838
Pages 6 and 7 of John Graham's report book 1835-1838
Pages 178 and 179 of John Graham's report book 1835-1838
Pages 118 and 119 of John Graham's report book 1835-1838
Pages 174 and 175 of John Graham's report book 1835-1838
Pages 40 and 41 of John Graham's report book 1835-1838
Pages 108 and 109 of John Graham's report book 1835-1838
Pages 168 and 169 of John Graham's report book 1835-1838
Pages 110 and 111 of John Graham's report book 1835-1838
Pages 30 and 31 of John Graham's report book 1835-1838
