Incomplete letter, from Thomas Maclear to Sir John Herschel, dated at Royal Observatory, Cape of Good Hope Autographed letter, incomplete. Encloses a plan of the triangulation and comments on his method. Thinks of making the baseline on the parade a permanent standard and has written to the Governor to obtain permission, as there is friction between the Board of Ordnance and the Cape Authorities over the ownership of the Parade. Has had no reply from the Governor as yet. 23 November 1837