May 1870 or 1871 (hard to determine) according to File: Charles Sancomb 1900 Census

Source: FindAGrave.com - David Sancomb b.1871
  Date of Birth: 187_

Source: Grave Stone - David Sancomb b.1871
  Date of Birth: 1882

Source: Grave Stone - Ida Bodah b.1882
  Date of Birth: 1882

File: Nelson Sancomb b.1902 (Find A Grave)
Date of Birth: 1882

File: Ida Bodah b.1882 (find a grave)
Date of Birth: 8/23/1882
Place of Birth: Malone, Franklin County, New York

Source: Grave Stone - Ida Bodah b.1882
  Date of Death: 1948
  Burial

File: Nelson Sancomb b.1902 (Find A Grave)
Date of Death: 1948

Source: Unknown - maybe Norman Joseph Dupra
Date of Death: 8/31/1948
Place of Death: Malone, Franklin, New York, USA

File: Nelson Sancomb b.1902 - Grave Stone (Find A Grave)
Date of Birth: 1902

File: Nelson Sancomb b.1902 (Find A Grave)
Date of Birth: 2/16/1902
Place of Birth: Malone, Franklin County, New York

File: Nelson Sancomb b.1902 - Grave Stone (Find A Grave)
Date of Death: 1973

Norman Joseph Dupra stated
Date of Death: 6/1973
Place of Death: North Bangor, Franklin Co., New York
Burial
Place of Burial: Morning Side Cemetery, Malone, NY