Letter, from Thomas Maclear to Sir John Herschel, dated at Royal Observatory, Cape of Good Hope Autograph letter signed by sender. Was necessary to reduce the whole of the sixth months' observations. More scanty than he desired but much of his time was taken up observing the comet stars. Is now busy with the comet stars. Does not send the precession as John Frederick William Herschel has them in his list. 12 July 1836