A letter from Charles Elliot to James Dinwiddie
Cartography
One letter to James Dinwiddie from John McGeorge
Two letters to James Dinwiddie from A Mercer
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
Ticket to a mathematics class at the theological seminary of the Presbyterian Church of Nova Scotia
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