Petitions and letter to the Honourable Shipping Company on Samuel Dunn's work.

A series of petitions and letters to the Honourable Shipping Company including a blank certificate certifying unto the honourable Committee of shipping signed by Samuel Dunn, that the holder has been taught the tables for correcting Refraction and Parallax of the use of Hadley’s sextant in the Lunar method for finding the Longitude at sea; A plan of a petition to be presented to parliament on Samuel Dunn's Variation Charts in respect to the compass; payment received of 30 guineas at the India House for Samuel's book 'Treatise of Practical Navigation'; Payment of 80 pounds as part of gratuity of 100 guineas from the East India Company for the publication of a set of variation charts to Samuel Dunn; letter of thanks while Samuel improved the lunar method of finding the longitude at sea. two letters about a man trying to get a certificate from Samuel Dunn under false pretences and letters to the Honourable Committee of Shipping about Hadley's sextant.