The following data is extracted from Genealogy and Biography of Ontario County, New York.
William R. Turnbull, assessor of Seneca township, Ontario county, New York, is a member of a family which was among the pioneer settlers of the county, and the various generations of which have been closely identified with its agricultural interests. Thoroughly conversant with the details of farming and sheep raising, honorable and highminded in all the different phases of life, he occupies an enviable position among his fellow townsmen, who willingly accord to him a place in their first ranks.
Adam Turnbull, grandfather of the above mentioned, came to Seneca township in 1801, and settled on the farm which is still in the possession of the family. At that time the land was in a wild and uncultivated condition, and Mr. Turnbull was an important factor in introducing measures which tended to the general improvement of the community.
Source: Genealogy and Biography of Ontario County, New York