Conversation so far:
When did Bell begin Alexander Graham Bell's early work on the telephone?
By 1874, Bell's initial work on the harmonic telegraph had entered a formative stage.
what led to his discovery of the telephone?
Bell experimented with a "phonautograph", a pen-like machine that could draw shapes of sound waves on smoked glass by tracing their vibrations.
What was happening at the time of his discovery?
In 1874, telegraph message traffic was rapidly expanding and in the words of Western Union President William Orton, had become "the nervous system of commerce".

Question: What can you tell me about his discovery of the "telephone"?
Self-contained rewrite: What can you tell me about Alexander Graham Bell's discovery of the Telephone?