This drawing which was commenced in October 1923 / and carried out during the reparation of St. Pauls / Cathedral, was completed in January 1928.To WILLIAM DUNN, F.R.I.B.A. / who first suggested the idea of showing the construction of St. Pauls Cathedral by Isometric Projection / - this drawing is inscribed by MERVYN EDMUND MACARTNEY, F.S.A. Surveyor to the Fabric -- Measured and drawn by R. B. BROOK-GREAVES in collaboration with W. GODFREY ALLEN / Valuable assistance has been rendered by Matthew Dawson F.R.I.B.A. & E.J.Bolwell' / 'Published by the Architectural Press Photo & Collo-imp. Donald Macbeth' This edition is limited to fifty copies of which this is No.30 Mervyn Macartney