Autograph manuscript, headed as in title, with autograph corrections and alterations in ink and blue crayon, and autograph comments and footnotes added in pencil. There are also autograph annotations and alterations in other hands, tentatively identified as those of Austin Robinson (fol. 6, pencil and blue crayon, fol. 7, pencil) and Richard Kahn (fols. 7, 8 and 9, ink). Joan Robinson has inscribed fol. 1 in blue crayon "E. & O. E." [Errors and Omissions Excepted]. This paper records an early stage of Joan Robinson's work on the geometrical analysis of the economics of value, monopoly and competition. It is an early and schematic working out not only of the ideas but also (partly) of the form of 'Economics of Imperfect Competition'. Some passages may be compared in detail (e.g., fol. 3 with 'Economics of Imperfect Competition' (1933), p. 30). The deleted incomplete draft table of contents of this paper (fol.1 ) shows, perhaps more clearly than the final table (fol. 1 r ), the similarity of form. 10 leaves foolscap, blue feint, watermark 'The New Smooth Ivory', Joan Robinson's text in ink. Leaves numbered by Joan Robinson [Contents], 1-9; with archival foliation 1-10.