Timeline of town creation in Downstate New York (English Wikipedia)

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Laws of the State of New York Passed at the Sessions of the Legislature Held in the Years 1785, 1786, 1787 and 1788, inclusive, Being the Eight, Ninth, Tenth and Eleventh, sessions. Vol. II. Weed, Parsons and Company/State of New York. 1886. p. 748. Retrieved September 13, 2010.
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The Colonial Laws of the State of New York From 1664 to the Revolution, Including the Charters to the Duke of York, the Commissions and Instructions to the Colonial Governors, the Duke's Laws, the Laws of Dongan and Leisler Assemblies, the Charters of Albany and New York and the Acts of the Colonial Legislatures from 1691 to 1775 Inclusive. Vol. V. James B. Lyon (State of New York). 1894. p. 383 and 395. Retrieved September 1, 2009.
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Laws of the State of New York, Passed at the One Hundred and Thirty-Eighth Session of the Legislature, Begun January Sixth, 1915 and Ended May Twenty-Fourth, 1915, in the City of Albany, and Also Other Matters Required by Law to be Published with the Session Laws. Vol. II. J.B. Lyon Company/State of New York. 1915. p. 1074.
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brookhavensouthhaven.org

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cityofpeekskill.com

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longislandgenealogy.com

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ryeny.gov

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dos.state.ny.us

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web.archive.org

"Local Government Handbook" (PDF) (5th ed.). New York State Department of State. 2008. pp. 60 (PDF 64). Archived from the original (PDF) on December 25, 2010. Retrieved October 5, 2010.
"About Peekskill". City of Peekskill, New York. Archived from the original on August 12, 2010. Retrieved October 3, 2010.
"Consolidation: The Creation of Greater New York in 1898" (PDF). Edward T. O’Donnell. Archived from the original (PDF) on July 10, 2011. Retrieved September 20, 2009.