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