John: Yes, Round Prairie is in Monroe Co. There are several mentions in the history book of Monroe Co., Arrowheads to Aerojets. I thought the following would interest you: "PRAIRIE DU LONG PRECINCT Prairie du Long Precinct was organized in 1834. "It commenced at Thomas Talbott's mills on Prairie du Long Creek, thence direct to the big spring on Horse Creek, thence southwest to the old road from New Design to Kaskaskia, thence down said road to the Randolph line." The precinct received its name from the prairie that constituted such an important part of its territory. It is in the extreme eastern part of the county. Its area embraces the whole of Township 3, Range 8, together with a strip of territory Iying between the Kaskaskia River and the west boundary line of Township 3-11; also Sections 1, 12, 13, 24, and 25 of Township 3-9; Section 36 and half of Section 25 in Township 2-9. Most of the territory was wooded originally and the timber was quite heavy along the streams. Prairie du Long and Prairie du Round (hybrid terms of French and English) were so named on account of the shapes of their open prairie areas. Long Prairie has a length of about nine miles, half of which lies in St. Clair County. Its width is about three and a half miles. Round Prairie is about three miles in circumference and lies a little southwest of the central part of Township 3-8. A small portion of Twelve Mile Prairie lies in the northeastern part. Horse Prairie extends a short distance into the precinct from the south. The surface, aside from the prairies, is mainly broken. The timber, of which there was a considerable amount, consisted of oaks, hickories, maple, ash, pecan, and black walnut. The principal streams are the Kaskaskia River, Richland Creek, and Prairie du Long Creek. In the early days of the precinct, iron bridges spanned the creeks..." Janet Flynn, Secretary M.C.G.S.