Letter, from Friedrich August Theodor Winnecke to Sir John Herschel, dated at 17 Kriegstrasse, Karlsruhe Autograph letter signed by sender, with annotations by recipient. Needs some information about the astronomical sweeps carried out by John Frederick William Herschel's father, William. FW comments about the location and shape of some nebulae, and what seem to be differences with other catalogues. 8 January 1868