lorsearch on Family Tree Circles

I am searching for my moms, moms father. Daisy L. and Jessie E. Harrison lived with their grandparents in Toledo,Ohio. The 1910 census Daisy L. Harrison was 6, Jessie E.Harrison was 13. Head of household was Allon A Harrison, his wife was Jessie R. Harrison, there was also a William H. Harrison age 24. I dont know why the two girls lived with the grandparents, where is their father?