Found no Darrows in the index, nor a Danial Miller, but had success with Parsons. Many Millers in the index; any other first names?You'll learn why you didn't find the Parsons in Ohio in the 1850 Census.
PARSONS, NATHAN, Union township, farmer, post office Rossville, was born in Holmes county, Ohio, December 19, 1823, and lived at home until 1844, when he followed agriculture in summer and teaching school in winter.In 1845 he married Miss M. Workman and settled in Holmes county, where he lived eight years.He then went to Illinois, and returned in 1856 to Knox county and settled on his present farm.He has seven children-- Abraham, born in 1849; Jacob, 1851; Isaac, 1849; Edith Jane, 1854; Grace, 1857; Della Ann, 1860; Ida J., 1863.
Abraham commenced his medical education in 1863 with Dr. Putnam of Mt. Holly, now deceased, and finished it in 1869.He graduated in the Wooster university and settled in Gann.He takes the field of his preceptor, who was well known throughout the county.Mr. Parsons has filled the office of justice of the peace for a number of years.He has tried to fill the office with zeal and energy and judge for right in all cases.
[Note: double checked the d.o.b's for the children; this is how they appear.]