i and ii; Scherer, _Cotton as a World Power_, pp.

168, 175.] [Footnote 4: Locke, _Anti-Slavery_, chaps.

i and ii.] [Footnote 5: Jay, _An Inquiry_, p.

30.] [Footnote 6: Ford edition, _Jefferson's Writings_, III, p.

432.] [Footnote 7: For the passage of this ordinance three reasons have been given: Slavery then prior to the invention of the cotton gin was considered a necessary evil in the South.