[4-23] Virginia Magazine of History and Biography, Vol. VI, p. 260.

[4-24] Virginia Magazine of History and Biography, Vol. VII, p. 382.

[4-25] Virginia Magazine of History and Biography, Vol. VIII, p. 149.

[4-26] Governor Yeardley's Instructions of 1626 contain the statement that "tobacco falleth every day more and more to a baser price."

[4-27] Virginia Magazine of History and Biography, Vol. VII, p. 376.

[4-28] Virginia Magazine of History and Biography, Vol. VIII, p. 159.

[4-29] Virginia Magazine of History and Biography, Vol. IX, p. 177.

[4-30] Virginia Magazine of History and Biography, Vol. X, p. 425.

[4-31] G. L. Beer, Origins of the British Colonial System, p. 159.