Reporting on the timekeeper [K1], and on his observations during the passage to Tenerife (en route to New South Wales).

Concerning observations taken (including observations for the rate of the timekeeper, K1).

Concerning observations made and including revised calculations of latitudes and longitudes by the timekeeper [K1].

Reporting on their progress (the ship had arrived at Rio de Janeiro) and on observations made en route. Dawes also mentions that his cabin was partially under water and that his Requisite Tables had been damaged and needed replacing.

Reporting on observations made at the Island of Enxadas, Rio de Janeiro. The letter includes mention of a visit by two astronomers from Portugal employed to settle the limits between the Spanish and Portuguese settlements in Brazil.

Reporting on observations made in Rio de Janeiro and on meeting Colonel Gordon, Commandant of the troops at Cape Town and a keen astronomer. Dawes reports that he had arranged with Gordon for observations to be made at Cape Town of the comet which was expected the following year; he also lists Gordon's instruments and books to show his ability for the task.

Written from the new settlement at New South Wales. Dawes reports on his work there, mentioning the lack of resources and the clearing of land for an observatory. He includes a rough sketch of the observatory.

Reporting on his activities between leaving the Cape of Good Hope and his arrival at Sydney. The letter also includes an account of constructing the observatory in Sydney, and of the practical difficulties involved, particularly in finding suitable materials and craftsmen. He mentions, for example, that the forty marines employed in the work had to be provided with rum, water and new shoes (due to the damage from brushwood). Dawes also seeks further money and provisions.

Reporting on the status of the observatory (which was nearly complete), on expenses incurred, and on his role there.

Informing Maskelyne that he had a sent a letter via the Fishburn under Captain [Robert] Brown.

Reporting on his work at the observatory in Sydney. Dawes reports that he had seen nothing of the comet and complains that his duties as Engineer and Officer of Artillery were preventing him from attending to the observatory, which had soured his relationship with the Governor. He asks that a suitable person be sent out to take over the Observatory before his six years there had expired. He also reports the naming of Maskelyne Point.

Reporting on his work at the observatory in Sydney. He refers to the loss of HMS Sirius and states that the timekeeper [K1] was moved to HMS Supply undamaged. The letter also includes a description of his observatory.

Reporting on his work at the observatory at Sydney, and describing the main hindrances to his work (including the lack of 'men of business' in the country, the 'unfortunate want of abilities' of the surveyor of lands, and his problems with the Governor). The letter also includes a description of the local topography of Sydney and his opinion of the country - 'a more dreary, dismal, barren, inanimated [sic] country I believe does not exist anywhere in the whole world'.

Written on board HMS Gorgon on Dawes' return passage to England and concerning the safe return of instruments from the observatory at Sydney.

The letter is concerned with the settling of accounts.

The letter was sent with gifts of a pair of pigeons and some pears. The letter is covered with various computations in Maskelyne's hand.

Includes a drawing.

In the letter Marsden praises Maskelyne's 'British Mariner's Guide' and method of finding longitude, and relates his own observations made with a sextant.

Covering letter sent with an enclosed paper (non-extant) commenting on the accuracy of some tables.

The letter is concerned with a set of papers which are to be examined by the Board of Longitude Oversight Committee which included Sir Joseph Banks. The letter is covered with various computations.

The letters are primarily from Nevil Maskelyne but include three sent to Andrews by Margaret Maskelyne, following the death of her father.

On the death of Margaret's father, Nevil Maskelyne.

From Mr Marsden concerning papers from Captain Flinders.