 Missouri, citing evidence from surveyor Joseph C. Brown, who had established the meridian grid for the Louisiana Purchase, said using the Kaw Point starting point was invalid and that the survey should have been based on the mouth of the Ohio River.Using that calculation, he said that Missouri’s border should extend about 9.5 miles even further into Iowa (with the town of Keosauqua, Iowa, specifically coming into play).In 1839, the Clark County, Missouri sheriff went into this new stretch to collect taxes.