4182353
Frank A Sedgwick  [Edmond Sedgwick / Mary Unknown]
b. July 1878, New York2
m. abt 1902,2 [Brooklyn, Kings, New York], Sadie Douglass

Sadie Douglass  [parents unknown]
b. January? 1878, New York2
m1 Unknown
m2 abt 1902,2 [Brooklyn, Kings, New York], Frank A Sedgwick

Census Records:

1880 NY Rensselaer, Stephentown
1900 NY Kings, Brooklyn
1910 NY Kings, Brooklyn
1920 NY Kings, Brooklyn
This must be wife Sadie:
1900 NY Kings, Brooklyn

The woman who appears to be Sadie Douglass is widowed in the 1910 census. Was Douglass her maiden name, or the surname of her first husband?

Children:

Alfred Sedgwick (41823531)
  b. abt 1903, New York2
Frank Douglass Sedgwick (41823532)
  b. April 4, 1907, New York2,4
  d. March 12, 1985Brevard County, Florida4
Walter Edward Sedgwick (41823533)
  b. September 19, 1912, New York2,4,5
  d. November 7, 1989, Brevard County, Florida4,5
  m. Thelma Mary Monroe3a
Susie Sedgwick (41823534)
  abt 1917, New York2

More about Frank A Sedgwick:

NHCHS collection Box 6 Folder I sheet 28

Sources:

1. The Sedgwick Collection (MSS B46) at the New Haven Colony Historical Society papers of Hubert Merrill Sedgwick, Francis Morris Sedgwick and Frederick J Sedgwick,
genealogists of the family of Robert Sedgwick (1613 - 1656)

2. Census records, any of those indicated.

3. Records of family members or descendants
a. Douglass Alfred Sedgwick, son of Walter Edward Sedgwick

4. Florida Death Index, 1980-89
an Ancestry.com database
these records:
NameCertificateDeath PlaceRaceDeath DateBirth Date
Frank Douglass Sedgwick24055BrevardW12 Mar 198504 Apr 1907
Walter Edward Sedgwick109971BrevardW07 Nov 198919 Sep 1912
Mary Thelma Sedgwick46181BrevardW14 May 198612 Sep 1915

5. Social Security Death Index
Name/Birth Date/Death Date/Last Residence (City,County,State)/Issued
Walter E Sedgwick/19 Sep 1912/7 Nov 1989/Satellite Beach, Brevard, Florida/New Jersey (1956-1958)