Letter, from Adolphe Quetelet to Sir John Herschel, dated at Brussels Autograph letter signed by sender. John Frederick William Herschel's last letter before departure has brought Adolphe Quetelet great pleasure. Has not received John Frederick William Herschel's memoir on absorption of light. Has mentioned John Frederick William Herschel's name in an attempt to explain the idea of Cambridge Reunion. Disappointed at not yet having received equatorial and mural circle. Asks for news of John Frederick William Herschel's observations. 15 February 1834