It was only 135 years ago, today, that Alexander Graham Bell was awarded his patent for the telephone. And here we have one of his first sketches of the magical device. To this day, it’s unsure if he was standing on the edge of his toilet, hanging a clock, and slipped on wet porcelain before drawing this.
The description says:
As far as I can remember, these are the first drawings made of my telephone—or “instrument for the transmission of vocal utterance by telegraph.” -A. Graham Bell