Two letters to James Dinwiddie from the Royal Institution
Logarithms
Astronomy
One letter to James Dinwiddie from Lt. Gen. Helvill
One letter to James Dinwiddie from John McGeorge
Two letters to James Dinwiddie from A Mercer
One letter to James Dinwiddie from James White
Cartography
A letter from Charles Elliot to James Dinwiddie
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