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- [S1256] PA, Erie County History, (Chicago: Warner, Beers & Co., 1884), Venango Township, p. 187: George W. Dean.
Mrs. Mary Chase is first of the eight children listed for Samuel and Zadia (Bailey) Dean.
- [S473] Chase, David (I20566): 1850 US Census, (www.ancestry.com (2005): National Archives and Records Administration micropublication M432, roll 777, page 9B, line 24, dwelling 132, family 132; image accessed 12/27/2008.), 1850.PA.Erie.Amity.18.
- [S476] Chase, David (I20566): 1880 US Census, (www.ancestry.com (2005): National Archives and Records Administration micropublication T9, roll 1127, enumeration district (ED) 140, enumerated page 1, master page 1A, line 13, dwelling 2, family 2; image accessed 12/27/2008.), 1880.PA.Erie.Amity.140.1.
- [S474] Chase, David (I20556): 1860 US Census, (www.ancestry.com (2004): National Archives and Records Administration micropublication M653, roll 1107 enumerated page 20, master page 20, line 17, dwelling #, family 156; image accessed 12/27/2008.), 1860.PA.Erie.Amity.20.
- [S475] Chase, David (I20566): 1870 US Census, (www.ancestry.com (2003): National Archives and Records Administration micropublication M593, roll 1339, enumerated page 20, master page 120(B), line 37, dwelling 170, family 170; image accessed 12/27/2008.), 1870.PA.Erie.Amity.20.
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