AHAUS, a circle in the department of Munster, and Prussian province of Westphalia, formed out of the old lordships of Bocholt and Horstmar. It is 264 square miles, or 168,960 acres, in extent, comprehending four cities, three market towns, and 11 villages, with 40,069 inhabitants. The soil is moderately fertile, and yields corn, buck-wheat, and flax. It is watered by the Aa, the Berkel, the Bechta, the Dinkel, and several smaller streams. The most valuable products are cattle, and especially sheep. There is some little spinning and weaving of linen; but the higher wages paid in Holland induce the labourers to go to that country, in the seasons of hay and corn harvest, to save the means of subsistence for the winter.—The chief city of the circle, of the same name, is the residence of the Prince of Salm-kyrburg; and contains, besides his castle, 271 houses, and 1658 inhabitants. Long. 7. 4. 34. E. Lat. 52. 4. 36. N.