“You want to report by phone then, don’t you?” Alan took a compact packet about six inches square from a holster attached to her belt and handed it to Wilma.

So far as I could see, it had no special receiver for the ear. Wilma merely threw back a lid, as though she were opening a book, and began to talk. The voice that came back from the machine was as audible as her own.

- Armageddon - 2419AD, Philip Francis Nowlan, 1928