The American traveller, or, Observations on the present state, culture and commerce of the British colonies in America, and the further improvements of which they are capable : with an account of the exports, imports and returns of each colony respectively,--and of the numbers of British ships and seamen, merchants, traders and manufacturers employed by all collectively : together with the amount of the revenue arising to Great-Britain therefrom : in a series of letters written originally to the Right Honourable the Earl of ********* /