Letter, from Sir William Pole to Sir John Herschel, dated at 3 Storey's Gate Autograph letter signed by sender. Thanks for note of 29 [July]. Expresses doubt over accuracy of his observations of a solar eclipse. Stresses the necessity of careful comparison of various observations. Asks John Frederick William Herschel's opinion of a photograph with prominences greater and corona less than supposed. 6 August 1860