Arrowsmith Township was named by the Supervisors after Ezekiel Arrowsmith, who was the first Supervisor and one of the early settlers. It contains thirty-six sections, being a full Congressional township, and is known of record as Town 23 north, Range 5 east of the Third Principal Meridian. It is almost entirely prairie, having originally about one square mile of timber in Sections 31 and 32, where the eastern extremity of Old Town Timber lies along the line of Arrowsmith and West, giving to each a little patch of woodland, which was so highly prized by those who first commenced settlement here. There was in addition a small bunch on Section 24, " Smith's Grove." which hardly grew to the importance of being called timber-land.