Mr. Vail was at the Baltimore end of the line.
Miss Ellsworth, the young lady who had the promise of sending the first message, was with Mr. Morse.
Remember the twelve long, weary, anxious years, during which Mr. Morse had worked and waited.
It was an anxious moment.
Miss Ellsworth chose her message from the Bible.
It is found in Numbers, 23rd chapter, 23rd verse.
The words are: "What hath God wrought!"
This was received at once by Mr. Vail.
Professor Morse said this of the words of the message:—
"It baptized the American Telegraph with the name of the author."