Wife may belong to another sibling. No sibling with the birthdate specified in the Ludden book has been discovered.
Harry Park and Parker Edgar - confusion?
"Massachusetts Births, 1841-1915," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:FXJ8-DN8 : accessed 26 December 2015), Richard Edgar Ludden in entry for Harry Park Ludden, 10 Apr 1908; citing Springfield, Massachusetts, reference p 180, Massachusetts Archives, Boston; FHL microfilm 2,315,250.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M2JY-NHS : 29 October 2015), Richard E Ludden, Springfield Ward 1, Hampden, Massachusetts, United States; citing enumeration district (ED) ED 591, sheet 20B, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,374,604.
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Featured National Park champion connections: Harry is 22 degrees from Theodore Roosevelt, 27 degrees from Stephanus Johannes Paulus Kruger, 20 degrees from George Catlin, 25 degrees from Marjory Douglas, 31 degrees from Sueko Embrey, 21 degrees from George Grinnell, 33 degrees from Anton Kröller, 21 degrees from Stephen Mather, 27 degrees from Kara McKean, 22 degrees from John Muir, 23 degrees from Victoria Hanover and 34 degrees from Charles Young on our single family tree. Login to find your connection.