What were the first words spoken by Alexander Graham Bell over the telephone on March 10, 1876?

Answer

Mr. Watson—Come here—I want to see you.

The text explicitly states that the breakthrough moment occurred when Alexander Graham Bell spoke the words, "Mr. Watson—Come here—I want to see you," on March 10, 1876.

What were the first words spoken by Alexander Graham Bell over the telephone on March 10, 1876?
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