GEOMETRY

Ghyka, who was grew up and was educated in France, settled in London after the Second World War, and is considered one of the most significant members of the Romanian diaspora. His main preoccupation was with geometry and mathematical aesthetics, and his publications on the subject were influential: the ‘first epiphany’ of theatre director Peter Brook ‘came while reading a book by the Romanian prince Matila Ghika while staying with Salvador Dalí in Spain’ (Guardian, 17 January 2010).

2pp., 12mo. 42 lines. Bifolium. Fair, on aged paper. Addressed on reverse of second leaf to 'I. P. Cory Esq'. The letter begins: 'A friend of mine Mr. Jackson having told Mr. Rowbotham [Ruskin's tutor John Rowbotham] that I had discovered a method of trisecting an angle that gentleman said he had done it himself, which I believe he has, upon the proposition you showed me - he says it was originally published by Professor Leslie'. Inglis considers that 'Mr. R. seems to have hit upon something he does not quite comprehend'.

2pp., 4to. Bifolium. Good, on lightly-aged paper. Black wax seal adhering to reverse of second leaf, which is addressed, with postmarks, by Rigaud to 'Revd. W. T. Hopkins / Elmdon House / Coventry'. He explains, with two diagrams, a geometrical mistake by Hopkins, the letter beginning: 'Your difficulty arises entirely from your imagining that the squares of lines are proportionate to the lines themselves - This is by no means the case'.

8vo, 12 pp. Stapled and in original blue printed wraps. Good, with minor staining to wraps at top of spine. Eight 'Rules' and three 'Regulations', with a separate entry on 'Regulations for the Use of the Library'. Not listed on COPAC.

4to: 2 pp. Text clear and entire on lightly creased, grubby and dogeared paper. Titled by Cousinéry 'Création d'un Musée des Travaux Publics, Envoi d'une Note à ce sujet.' The note is not present.

Written on both sides of the card, dimensions 5.5 x 9 cm. Good, with a little light scuffing on the front. Communication between two leading lights of French nineteenth-century mathematics. Printed text reads 'VICE-AMIRAL DE JONQUIERES | MEMBRE DE L'INSTITUT | AVENUE BUGEAUD, 2'. Asks Lalanne to 'inscrire Monsieur Bonnaffé, lauréat de l'Institut, parmi les lecteurs'.

Wortmann - whose 'Das Gesetz Des Kosmos' (1965) is considered a cosmological masterpiece - corresponded with Hermann Hesse, and was the only modern author to be described by him as a master of the Glass Bead Game. The Sacred Science Institute in America is presently working with Wortmann's family to bring out an edition of his work. The collection is discoloured with age and some leaves are slightly dog-eared, but the whole is in good condition.