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