The Columbus & Xenia Railroad. passing through London, was constructed in 1848-49. The first passenger train passed over the road February 20, 1850. With this road the electro-magnetic telegraph was brought into use in London. At the depot of the same road, though now known as the Little Miami Division of the P., C. & St. L. R. R., is located the office of the Western Union line, under the management of John Kennelly.
In 1872, at the completion of the C., S. & C. R. R., from London to Columbus, a line of the Atlantic & Pacific Telegraph Company was constructed through the town, which, in January, 1881, on the consolidation of that company with the Western Union, became an office of the latter company, and is now a branch of the Western Union office proper, at the depot of the Little Miami Division of the P., C. & St. L. R. R. That road, too, has undergone a change, and is now the I., B. & W. R. R.
In February, 1882, an office of the Mutual Union was opened in London, under the management of J. J. Kennedy.
During the year 1882, a number of telephones were constructed in the town, by the Midland Telephone Company of Chicago, under the management of Job J. Clark. Telephonic connection between London and Springfield, and between London and Columbus, was completed November 18, 1882. Connection is now made between London and the surrounding towns and cities, and between points as far south as Cincinnati, Covington, Middletown, Lebanon and other places as far distant.