Was pleased to get his twelve pages of slips returned this morning. In one he proposes an alteration of 3% instead of 1003 to 1000. Which is correct?

Has just written to Longman's to say how pleased he will be if Miss Kerth translates his book into French. Regrets delay, but has been travelling in Italy.

Has seen JH's letter regarding the use of compressed air for working machinery in deep mines. Encloses two papers on the subject by one of his sons. Comments on the use FL has made of compressed air in his mines.

Sending his observations on the effect of the moon on the earth's atmosphere.

In response to FK's 1866-4-17, JH says that he knows nothing about screw propulsion in ships and so cannot comment on FK's paper.

Comments on the relationship between the plane of the earth's orbit and the obliquity of the ecliptic.

[Samuel] Parlby papers are in the hands of [John] Steuart, who will hand them over to the new Attorney General when he arrives. Several epidemics have visited the Observatory and William Mann is now convalescing in Natal. [James] Adamson has caused unpleasantness with the reduction of the meteorological journals. Railroad building has stopped at the Cape. Difficulties with the electric telegraph.

Outlining the chances and difficulties of bringing the [Samuel] Parlby case before the Cape Government. Alexander Herschel would have been delighted with the display of shooting stars and volcanic eruptions seen at the Cape last Thursday.

Reports a second failure over the [Samuel] Parlby affair. Buried Ellen last Thursday. Unemployment and lack of food at Cape owing to the financial difficulties of the government. Difficulties over the standards now.

Sending a further section to be added to the Arc of Meridian. Comments on Nicolas Lacaille's work on the meridian. Has cherished memories of thirty years previous to this time of the year.

Sends four sheets of his Memoir of Thomas Drummond and would be pleased if JH would look over them and correct any errors. Miss Elizabeth Drummond continues an invalid. Is also sending the proof sheets to Sir T. A. Larcom.

Many thanks for his prompt attention to the proof sheets; sends some more. Miss Elizabeth Drummond is gratified by JH's interest.

Regarding the inventor of the compensation bars. Would not attribute their invention to Thomas Drummond in the light of J. E. Portlock's evidence. Thanks for the paper on ancient Greek kinship.

Was not prepared for the facts regarding the invention of the compensation bars as expressed in JH's letter. Will investigate the various claimants further.

Sends proof sheet on the mathematics of representation. Intends to print in full JH's letter to Mrs. Drummond. Has not yet received information regarding the measuring bars as T. A. Larcom is busy.

Sends the last sheet of the Memoir that will be necessary for JH to see. Sheets on the measuring bars are held in abeyance.

The packet for Wilfred Heely has just been delivered and JM will arrange for it to be forwarded to Calcutta by the Mail steamer.

Is grateful for JH's translation of Homer, which he values. Regrets to see JH's son so fatigued.

Has been travelling around lecturing on geology since he left the London Polytechnic in 1861. Wishes that someone like JH would consider geological features from a dynamical point of view.

Agrees that a large part of the hills and valleys are due to tidal action. Comments further on this, especially relating to parts of France. The Hawkhurst lectures have ceased and are not likely to be resumed.