Image of the Observations of Saturn Image attached to LBO/4/31, being a letter from Monsieur Hevelius to Henry Oldenburg 'Concerning some Astronomicall Observations of his Viz of a New starre seen neare Cygnus, and of many more starrs by him discovered in that Constellation, than hitherto : as also of the present Figure of Saturne etc. ' dated 27 August 1670 One sheet of paper, with two illustrations. Saturn figure entitled 'Fig 11 Saturnae Observatio G E D A N I Anno 1670 Die 26 August. Joh. Hevelio Size whole illustration including Cygnus observations Size 210 mm high x 145 mm wide Siz illustratioj of Saturn alone 170 mm high x 145 mm wide 26 August 1670