S.B. Jackson, ex-sheriff of Woodbury County, was born in Pennsylvania in 1845; removed to Linn County, Iowa, in 1864; thence to this city and engaged in the real estate business. He was elected mayor in 1877, and served three terms; was elected sheriff in 1879; his term expiring with the beginning of the present year; Mr. Jackson served two years in the late war in Co. B., 17th Pennsylvania Inf.