30 letter to James Dinwiddie from Joseph Hume
A letter from Charles Elliot to James Dinwiddie
Astronomy
Deduction of the Distance by Mitchell Method
Lecture Notes
Logarithms
Mathematics, No. 1-3
Notes regarding celestial navigation
One letter to James Dinwiddie from James Faulkner
One letter to James Dinwiddie from James White
One letter to James Dinwiddie from John McGeorge
One letter to James Dinwiddie from Lt. Gen. Helvill
Trigonometry
Two letters to James Dinwiddie from A Mercer
Two letters to James Dinwiddie from the Royal Institution
Vol. 13 [Queries and HInts]