Modern Electrics, October, 1911, page 408:
ANOTHER WIRELESS TELEPHONE.
An Englishman, Matthews, is preparing for extensive experiments with his system of wireless telephony. He proposes to use man lifting kites to talk a distance of 25 miles between Chepstow and Cardiff, England.
His outfit is said to be contained within a small box and consists principally of a battery, a motor, and a transformer, the whole weighing but twelve pounds. The cost is stated to be about $50 by the inventor. While the electricians are quite skeptic as to the value of the invention, the inventor displays the characteristic assurance of success.