Letter, from Henry Liddell to Sir John Herschel, dated at Slough Mechanics' Inst. Autograph letter signed by sender. Sends copy of the rules of the Institute. At a Special General meeting John Frederick William Herschel was elected president. This is subject to John Frederick William Herschel's approval. Would like him to be present at the opening of the new Institute on the 25th of the next month. 8 May 1848