The Iowa State Register, April 27, 1882
"THE WORLD WONDER WILDE,
visited this aesthetic city yesterday, and lectured last evening at the Opera House."
Source: No newspaper clipping available yet. Reference to the primary source comes The Palimpsest, Volume XVIII, No. 6: June, 1937, published by State Historical Society of Iowa, Des Moines, IA, 1937 (Briggs, John Ely, editor).
verification of Lecture
The Centerville Times, May 2, 1882