Conversation so far:
When did Alexander Graham Bell begin his early work on the telephone?
Returning to Boston in fall 1873, Alexander Graham Bell made a fateful decision to concentrate on his experiments in sound.
What led to Alexander Graham Bell's discovery of the telephone?
Alexander Graham Bell had long been fascinated by the idea of transmitting speech, and by 1875 had come up with a simple receiver that could turn electricity into sound.
What was happening at the time of Alexander Graham Bell's discovery?
In 1874, at the time of Alexander Graham Bell's discovery, telegraph message traffic was rapidly expanding and in the words of William Orton, had become the nervous system of commerce.
What can you tell me about Alexander Graham Bell's discovery of the telephone?
Alexander Graham Bell, who shared a laboratory with Antonio Meucci, who had already sent a telephone model to Western Union executives, filed a patent for a telephone in 1876
What did Alexander Graham Bell do from there?
Antonio Meucci sued Alexander Graham Bell for stealing his telephone idea, but he passed away and charges were dropped. After that, wealthy patrons began to financially support Bell's experiments
Are there any other interesting aspects about Alexander Graham Bell's invention of the telephone besides the early experiments, controversy regarding who invented it first, or his work with the deaf?
A chance meeting in 1874 between Alexander Graham Bell and Thomas A. Watson occured which helped produce the telephone.

Question: What happened at that meeting?
Self-contained rewrite: What happened at the meeting between Alexander Graham Bell and Thomas A. Watson?