This set of notations consists of two sheets that were numbered consecutively as Sheet 1 and Sheet 2 by Babbage, and three related sheets.
One of the related sheets, in ink, appears to relate to all the sheets of Notation 211. It is described as 'Mill. Cycles of fifteen and of twenty. Corrected to 28 March 1842. (the original dated 8 January 1838) Duplicate', and includes a pencil annotation 'Analytical Engine'. The sheet was numbered F.211[a] by Bromley.
The other two related sheets are described as 'Cycles of the Analytical Engine', dated 14 August 1841 and numbered 211x Sheet 1 and Sheet 2 by Babbage and F.211x/1 and F.211x/2 by Bromley. Sheet 1 has an added pencil notation stating that it is 'not exactly like the copy'.
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