Riley married Rumina Elizabeth Hadley Guss on 17 Jan 1869 in Girard, Crawford, Kansas, USA. Rumina (daughter of Samuel Foose Guss and Mary Elizabeth Hill Hadley) was born on 30 Apr 1852 in Livingston, Illinois, USA; died on 11 Mar 1925 in Rapelje, Stillwater, Montana, USA; was buried in Rapelje Cemetery, Stillwater, Montana, USA. [Group Sheet] [Family Chart]

1. Mary Jane Pearson was born on 7 Feb 1870 in Cato, Crawford, Kansas, USA; died on 18 Mar 1946 in Billings, Yellowstone, Kansas, USA; was buried in Mountain View Cemetery, Columbus, Stillwater, Montana, USA.
2. Fannie Mae Guss Pearson was born on 24 Oct 1872 in Arcadia, Crawford, Kansas, USA; died on 16 Jan 1934 in Rapelje, Stillwater, Montana, USA; was buried in Rapelje Cemetery, Rapelje, Stillwater, Montana, USA.
3. William Riley Guss Pearson was born on 15 Nov 1874 in Cato, Crawford, Kansas, USA; died on 4 Aug 1875.
4. John Samuel Pearson was born on 15 Jan 1876 in Arcadia, Crawford, Kansas, USA; died on 1 Dec 1918 in Rapelje, Stillwater, Montana, USA; was buried in Rapelje Cemetery, Rapelje, Stillwater, Montana, USA.
5. Charles Luther Guss Pearson was born on 9 Jul 1878 in Crawford, Kansas, USA; died on 17 Nov 1886 in Crawford, Kansas, USA.
6. Eldia Wilmina Guss Pearson was born on 29 Sep 1880 in Cato, Bourbon, Kansas, USA; died on 8 Oct 1960 in Fort Scott, Bourbon, Kansas, USA; was buried in Clarksburg Cemetery, Fort Scott, Bourbon, Kansas, USA.
7. George Wesley Pearson was born on 27 Jan 1882 in Pittsburg, Crawford, Kansasa, USA; died on 23 Aug 1978 in Lamar, Prowers, Colorado, USA; was buried in Fairmount Cemetery, Lamar, Prowers, Colorado, USA.
8. Gussie Leslie Guss Pearson was born on 22 Apr 1885 in Kansas, USA; died on 18 Feb 1887 in Kansas, USA.
9. Frank Robert Guss Pearson was born on 16 Jan 1888 in Fort Scott, Bourbon, Kansas, USA; died on 9 Dec 1930 in Yelllowstone, Montana, USA; was buried in Prarie Bell Cemetery, Rapelje, Stillwater, Montana, USA.
10. Hazel Earl Vinton Guss Pearson was born on 12 Mar 1891 in Cato, Crawford, Kansas, USA; died on 2 Oct 1981 in Medford, Jackson, Oregon, USA; was buried in Hillcrest Memorial Park, Medford, Jackson, Oregon, USA.
11. Ancel James Thomas Guss Pearson was born on 2 Feb 1893 in Arcadia, Crawford, Kansas, USA; died on 24 Jul 1976 in Stillwater, Montana, USA; was buried in Rapelje Cemetery, Rapelje, Stillwater, Montana, USA.
12. Son Guss Pearson was born in 1895 in Crawford, Crawford, Kansas, USA; died in 1895 in Crawford, Crawford, Kansas, USA.