Thoughts upon several interesting subjects, viz. on the exportation of, and bounty upon corn : on the high price of provisions, on manufactures, commerce, &c. : being a full answer to a pamphlet, lately published, intitled, The expediency of a free exportation of corn at this time, &c. : in which 'tis proved, that facts advanced by the author, are falsified, and his conclusions erroneous and false : with a postscript ... in a letter to a friend /