_Aug. 29th._—I dined at the Castle. The Queen and Princess Elizabeth honoured me with kind enquiries after the health of my brother, &c. The Princesses Augusta and Mary also came to see me in Miss Beckedorff’s room. On coming home the next day, I found my brother had arrived the day before. _Sept. 22nd._—In taking the forty-foot mirror out of the tube, the beam to which the tackle is fixed broke in the middle, but fortunately not before it was nearly lowered into its carriage, &c., &c. Both my brothers had a narrow escape of being crushed to death. * * * * * * * * * * _Oct. 1st._—Received an account and letters announcing a comet. _Oct. 2nd._—Saw the comet, visible to the naked eye. _Oct. 4th._—My brother came from Brighton. The same night two parties from the Castle came to see the comet, and during the whole month my brother had not an evening to himself. As he was then in the midst of polishing the forty-foot mirror, rest became absolutely necessary after a day spent in that most laborious work; and it has ever been my opinion that on the 14th of October his nerves received a shock of which he never got the better afterwards; for on that day (in particular) he had hardly dismissed his troop of men, when visitors assembled, and from the time it was dark till past midnight he was on the grass-plot surrounded by between fifty and sixty persons, without having had time for putting on proper clothing, or for the least nourishment passing his lips. Among the company I remember were the Duke of Sussex, Prince Galitzin, Lord Darnley, a number of officers, Admiral Boston, and some ladies. _Nov. 3rd._—I came home to Upton (Mrs. H. returned from Brighton), but went most days to assist my brother in the polishing-room or library, and from the 10th December to the 22nd I was entirely at Slough going on as above uninterruptedly, Mrs. Herschel being with my nephew, and Miss Baldwin at Newbury with the Miss Whites. _Jan._—Many days at work in the library and workrooms assisting my brother. _Feb. 3rd._—When at work in the library the Duke of Cambridge came in. We were obliged to a storm for his visit, as he came in for the shelter. _Feb. 6th._—When I came to Slough to assist my brother in polishing the forty-foot mirror, I found my nephew very ill with an inflammatory sore throat and fever. _Feb. 9th._—Still very ill; and my brother obliged to go on with the polishing of the great mirror, as every arrangement had been made for that purpose. _Mem._ I believe my brother had reason for choosing the cold season for this laborious work, the exertion of which alone must put any man into a fever if he were ever so strong. _Feb. 10th._—From this day my nephew’s health kept on mending. _Feb. 19th._—My nephew mending, but my brother not well. _Feb. 26th._—My brother so ill that I was not allowed to see him, and till March 8 his life was despaired of, and by