Secondary Sources:
About the Navigation Acts 1650-1696
The Navigation Act of 1660, following the policy laid down in the statute of 1651 enacted under the Commonwealth, forbade any goods to be imported into or exported from His Majesty's plantations except in English, Irish, or colonial vessels of which the master and three fourths of the crew must be English; and it forbade the importation into England of any goods produced in the plantations unless carried in English ships. The act also aided English merchants by the requirement that goods of foreign origin should be imported directly from the place of production; and that certain enumerated commodities of the plantations should be carried only to English ports. These enumerated commodities were products of the southern and semitropical plantations: "Sugars, Tobacco, Cotton-wool, Indicoes, Ginger, Fustick or other dyeing wood."
http://www.chroniclesofamerica.com/southern-colonies/navigation_acts.htm

A View of the Blockade of Boston Harbour 1768
Unrest in Massachusetts was seen as a threat to increasingly stringent British rule. As a show of force, the prime minister brought two regiments into Boston from Halifax in October 1768.
http://www.masshist.org/online/gallery/doc-viewer.php?pid=16&item_id=234

Proclamation of Earl of Dunmore (1775)
http://www.pbs.org/wgbh/aia/part2/2h42.html

Overview of Colonial government in the Thirteen Colonies
http://en.wikipedia.org/wiki/Colonial_government
_in_the_Thirteen_Colonies