Letter, from Alexander Wylie to Sir John Herschel, dated at Singapore Autograph letter signed by sender. Received Outlines Astr. before leaving China. Describes 'comet' sighting [27 May 1860]. Sent details of it to William Lockhart [see Lockhart's HS 19.243]. Another witness, 'Rev. G. John,' will send report to John Frederick William Herschel. 21 November 1860