The following data is extracted from Historical and Biographical Sketches of Sac County, Iowa - Sac City.
Asa Platt, stock dealer and farmer, was born in Middlesex County, Conn., in 1830; moved with parents to Chautauqua County, N.Y., in 1839; thence in 1848 to Erie County, Penn., and engaged in the lumber business. In 1856 he moved to Sac City, Ia., which had just been laid out and contained only two log cabins. He pre-empted land near town, one hundred acres of which he laid out in town lots, and nearly all of which he has since sold. He engaged in mercantile business in 1864, which he continued for twelve years. In 1874 he erected a fine brick and stone residence in the city, at a cost of ten thousand dollars. He carries on his farm and is extensively engaged in buying and shipping stock.
J.D. Platt, of the firm of Schaller & Platt, proprietors of meat market, was born at Saybrook, Conn., in Dec., 1836; removed with parents to Chautauqua County, N.Y., in 1839. In 1850 he moved to Erie County, Pa., was employed for a time in a meat market, and afterwards engaged in business for himself; sold out in 1866 and moved to Sac County, Ia. He engaged in farming until 1874 when he moved to Sac City and opened a meat market which he run three years then sold. He next engaged in the stock business for several years, and in Aug., 1881, bought an interest in his present business. Mr. P. has been a member of the board of supervisors.
Source: Historical and Biographical Sketches of Sac County, Iowa - Sac City