A letter from Charles Elliot to James Dinwiddie
Cartography
Two letters to James Dinwiddie from A Mercer
One letter to James Dinwiddie from John McGeorge
One letter to James Dinwiddie from James White
One letter to James Dinwiddie from Lt. Gen. Helvill
Astronomy
Logarithms
Two letters to James Dinwiddie from the Royal Institution
One letter to James Dinwiddie from James Faulkner
30 letter to James Dinwiddie from Joseph Hume
Trigonometry
Lecture Notes
Mathematics, No. 1-3
Deduction of the Distance by Mitchell Method