Use the Gale eBooks database (link is below) to find short overview articles on topics related to your research.
Some recommended search terms:
The following articles from the free online World History Encyclopedia will give you background on On Plymouth Plantation and New English Canaan as well as Anne Hutchinson's trial.
Often the best information on historical topics is found in books, not articles. Use the table of contents and the index to locate the chapters/sections that are most relevant to your topic.
New World, Known World: Shaping Knowledge in Early Anglo-American Writing by 
A People's History of the United States, 1492-present by 
New England's Crises and Cultural Memory: Literature, Politics, History, Religion, 1620–1860 by 
Mayflower Lives: Pilgrims in a New World and the Early American Experience by 
The Trials of Thomas Morton: An Anglican Lawyer, His Puritan Foes, and the Battle for a New England by 
The American Dream: A Short History of an Idea That Shaped a Nation by 
If you'd like much more in-depth instruction about the process of conducting research, please check out our guides: