Oughtred, William [The Circles of Proportion] [London: Elias Allen, 1632], First edition, A1 (blank), A3- 4, B1-X4, 3 engraved plates, with three final leaves of diagrams and a final errata leaf with heading "The translator to the readers", [ESTC S11364], 3 engraved plates, with three final leaves of diagrams and a final errata leaf with heading "The translator to the readers", lacking printed and engraved titles, title supplied in an early hand to blank A1, upper corner of first 8 leaves creased and frayed with slight loss of margin, small adhesion affecting running title of A4 verso and adhesion transfer to following plate, some staining and browning to margins; bound with. Oughtred, William. An Addition unto the Use of the Instrument called the Circles of Proportion for the working of nauticall questions. London: Augustine Mathewes, 1633. 4to, A1-B3, seemingly lacking B4 ; [bound with] Oughtred, William. To the English Gentrie and all others Studious of the Mathematics. [London : A. Mathewes, 1634?], A1-D4 (with A2-A3 misbound), final leaf with errata slip pasted to lower part of leaf, adhesion resulting in loss of a few letters, [ESTC S119424], contemporary vellum, soiled and somewhat creased, early ownership signature to first work of James Stewart Footnote: Note: The rare first edition of The Circles of Proportion. This copy corresponds exactly (apart from the missing engraved and printed title) to the 1632 copy on EEBO.