The persons you requested information on are buried in New Haven Cemetery, New Haven Township, Huron County. The cemetery is located on State Route 61 & Skinner Road, between the towns of New Haven and Plymouth. The cemetery was in use from 1818 until 1948. The transcriptions were read in rows, from State Route 61, left to right.
Page 394 Row 12 Plot 9 - Sarah C. Dickinson, d/o _ & S. Dickinson died, April 23,1854 age, 5 yr. 8 mon. 23 days
Plot 10 - Ada A. Dickinson, d/o E. & S.J. Dickinson died, March 31,1864 age, 9 yr. 11 mon. 10 days
Sarah, his wife died, Oct. 23,1872 age, 57 yr. 3 mon. 9 days
Plot 10 George W. Dickinson, 1854 - 1940 Ella U., 1860 - 1895
When burials were discontinued in 1948, a new cemetery, named Maple Grove, was opened across State Route 61 from New Haven cemetery. There are a number of persons with the surname Dickinson buried in this cemetery. Almost assuredly, these are members of the extended family of the Dickinsons buried in New Haven Cemetery. However, it would appear from your later posting that the persons buried in New Haven are not the persons you are looking for.
If I can be of further assistance, feel free to contact me.