At l'iasa Chautauqua.A building boom has struck the Piaaa Chautauqua Assembly grounds and although several hundred are still on the grounds in their cottages, the workmen are already engaged in the erection of cottages for the late fall occupancy and next season.The Reverend G. D. McCullough of Cincinnati, O., has sold his cottage in Jersey avenue to Harry W. Watson of Mount Vernon, 111. Mr. Watsons fa her, Captain Watson, who is the postmaster at Mount Vernon, has purchased a lot adjoining and will erect a modern Chautauqua cottage in the spring.J. M. Finch has sold his lot on Alton avenue to H. A. Tunehorst of Jerseyville, who has already started work on the erection of the cottage.Mrs. H. A. Holmes of Hot Springs, Ark., has plans drawn for a new cot. tage which she will erect at once in Alton avenue.J. IV Ulrich of St. Louis has sold his cottage in the Auditorium terrace to A. E. Bassett, cashier of the Illinois Glass Company, a*. Al‘on. Mr. Bassett has already started work on plans for a new cottage.Mrs. T. P. Yerkes of Upper Alton has purchased the cottage of Judge A. M. Sla’en of Springfield avenue, and will start work within a few weeks upon the erection of another cottage. The new cottage of Mrs. Yerkes will be a'new type of architects for the Chautauqua, and will bo two stories in heigh*, with a three room flat on each floor.The Piasa Chautauqua Assembly started a corps of engineers at work yesterday surveying additions to the sewage system and extensions will be made in every part of the grounds. The plans for this will be prepared In time to let the bids for the construction nt the October meeting of the Board of Directors.