Most information from Bernard Mayhle

1910 Census - Greene County, Pennsylvania
Greensboro - 26,27,28 April 1910

  --- 111
  Elkins, Hugh    Head M W 32 M1 7     Irel Irel Irel Locomotive Fireman
  Gertrude I.     Wife F W 28 M1 7 3 3 Penn Penn Penn
  Mary E.         Dau  F W  6 S        Penn Irel Penn
  Lena C.         Dau  F W  5 S        Penn Irel Penn
  Charles R.      Son  M W  4 S        Penn Penn Penn

1920 Census - Fayette County, Pennsylvania
South Brownsville - 21 Jan 1920

  1310 134 144 Sheridan Avenua
  Elkins, Hugh    Head M W 40 Wd  Irel Irel Irel Locomotive Engineer
  Mary            Dau  F W 16 S   Penn Irel Penn
  Lena            Dau  F W 15 S   Penn Irel Penn Hotel Servant
  Charles         Son  M W 14 S   Penn Irel Penn
  Lida Bell       Dau  F W  8 S   Penn Irel Penn
 
1930 Census - Washington County, Pennsylvania
West Brownsville - 2 April 1930

  19 18 19 River Jeries
  Elkins, Hugh  Head M W 52 M 25 Irish Free State IFS IFS Locomotive Engineer
  Pearle F.     Wife F W 42 M 17 Penn Penn Penn

From Jim Emme:

Regarding Gertrude I. Gaskill:

She died between 1910*-1920, with her husband listed a
widower in 1920 PA FC South Brownsville census.  Also,
both 1910 an1920 censuses list him born in Ireland as
were his parents.  His birth year is approximately
1878-1880.

No record of Elkins deaths in any of my reference
books on Fayette Co., PA.  Best guess for Gertrude’s
death was 1912, since last child is Lida Bell, born
approx 1912, according to the 1920 census.