Hi Frances, I have been doing census work on Olneys and found this family as follows:
1880 United States Census
NameRelation Marital Status Gender Race Age Birthplace Occupation Father's Birthplace Mother's Birthplace William OLNEYSelfMMaleW40NYLaborerNYNY Kate OLNEYWifeMFemaleW31CANADADress MakerCANCAN
*** Olney, WilliamView Image Online Age: 80 Year: 1920 Birthplace: New York Roll:T625_377 Race: White Page:4B State: Illinois ED:103 County: LaSalle Image:1041 Township: Earl
William Olneyage 80b. NYfatherb. NYmotherb. Canada Katherine"age 73b. Canadafatherb. Francemotherb. Canada Ruby"age 34b. ILoperatortelephone company
Hope this is helpful.I do not know where this person fits in the Olney database.If you can give me more information about the family I might be able to help a little more. Joan Olsson P. S. Just noticed that I don't have the census location for the 1880 census.Will do so a.s.a.p.