Cedar Rapids Evening Gazette, December 17, 1920, page 11:
Cock's "Mornin" Heard 600 Miles
ROCK ISLAND, Dec. 17.--Rock Island claims to have the world's record long-distance-crowing rooster. His crow can be heard 600 miles away. While R. K. Karlowa was sending a wireless message to Dallas Texas, the rooster crowed and the operator at the receiving end said the cock's "mornin's mornin'" was so loud it woke his wife and she got up to make breakfast.