Informing Burt that the Admiralty had been instructed to conduct a comparative trial of his sounding instrument and that of Edward Massey.

Letter to the Board of Longitude enclosing five copies of an advertisement announcing a public trial of the comparative merits of Massey's sounding machine and 'Gould and Burt's Buoy and Knipper'. These were originally enclosed in a letter to Captain Thomas Hurd [RGO 14/31: 143-143a].

Copy of a letter from the Admiralty Office to Sir John Barrow [Second Secretary of the Admiralty] containing an extract from the proceedings of the Board of Longitude, requesting that the Admiralty arrange a comparative trial of the sounding instruments of Peter Burt and Edward Massey.

Letter to the Board of Longitude which originally enclosed a memorial on his perpetual log or perambulator; sent from Lambeth.

Letter to Dr Thomas Young proposing to present three new inventions to the Board: a marine thermometer, a watch beating Royal Seconds which would serve as a Journeyman Watch, and a watch with decimal seconds. Massey also mentions that he had previously received a reward of £200 by the Board of Longitude for his sounding machine, and a further premium of £500 from Mr Perceval.

Enclosing a memorial with copies of letters relating to his sounding machine. The memorial is at [RGO 14/31: 117-119] and the letters are at [RGO 14/31: 111-114].

Concerning his preparation of chronometers for trial on the forthcoming 'Northern voyage'. Massey explains that he had been preparing two chronometers for the voyage but that they would not be ready on time. He offers his first chronometer for trial, requesting however that should it fail the results not be made public, as it was still under development.

Five letters sent by Massey to Captain Thomas Hurd and Dr Thomas Young. The letters also make reference to Massey's sounding machine and patent log.

Includes a copy of a letter sent to Massey from Robert Pullman, Master of the HMS Ville de Paris, concerning his sounding machine.

Five letters sent by Massey to Captain Thomas Hurd and Dr Thomas Young. The letters also make reference to Massey's sounding machine and patent log.

Five letters sent by Massey to Captain Thomas Hurd and Dr Thomas Young. The letters also make reference to Massey's sounding machine and patent log.

Enclosing a letter and advertisements to lay before the Board of Longitude.

Five letters sent by Massey to Captain Thomas Hurd and Dr Thomas Young. The letters also make reference to Massey's sounding machine and patent log.

In which Massey refers to a letter he received from George Gilpin stating that the Board could not take into consideration inventions which had been patented. Massey requests the return of his papers, should the Board refuse to make an exception.

Twelve reports and two letters.

Informing Massey that his memorial and letter on his perpetual log and sounding machine had been presented to the Commissioners of Longitude.

Letter from Massey to the Board of longitude providing the results of the comparative trial made between his sounding machine and 'Gould and Burt's Buoy and Knipper'. Preceded by a related letter of enclosure to Thomas Hurd. For an advertisement for the public trial see [RGO 14/31: 145-149].

Rejecting his request for an advance of money from the Board of Longitude.

The pamphlet, which was printed in London by William Savage, includes both a second and third appendix, and directions for using both machines. It includes testimonials by Admiral Sir George Montague, Peter Bruff, Michael Spratt, Maurilius Adolphus de Starck, Henry Hope, Courtenay Boyle, Earl St. Vincent, Charles Cotton, Captain William Bedford, L. Lukin, John Pynsent, Captain R.J. Neve, and Thomas Moore.

The pamphlet, which was printed in London by Savage and Easingwood, includes testimonials by Admiral Sir George Montague, Peter Bruff, Michael Spratt, Maurilius Adolphus de Starck, Henry Hope, Courtenay Boyle, and Captain R.B. Vincent.