Edited sentence: Bell also won a second Gold Medal for Visible Speech, for his additional display at the exposition.Centennial Exposition in Philadelphia in 1876 made Bell's newly invented telephone a featured headline worldwide.Ironically, Bell hadn't even planned on exhibiting at the fair due to his heavy teaching schedule, and only went there at the stern insistence of Mabel, his then-fiancée and future wife.Mabel had understood Bell's reluctance to go to the exhibition, so she had secretly bought his train ticket, packed his bag, and then took the unknowing Bell to the train station where she told her shocked fiancé that he was going on a trip.Mabel was also the indirect source of her husband's early commercial success after his creation of the telephone.The U.The notable Brazilian Emperor Dom Pedro II and the eminent British physicist William Thomson (Lord Kelvin) recommended his device to the Committee of Electrical Awards, which voted Bell the Gold Medal for Electrical Equipment.When Bell started arguing with her, Mabel turned her sight away from him thus becoming literally deaf to his protests