"[2] In 1893 Mahon represented the Columbus local in asking the Ohio Legislature pass a law requiring streetcar companies to enclose their cars to protect the platform men.

The request was successful despite strong opposition from the street railway owners, and the first vestibule law was passed that year.

[9] The AFL saw the importance to the overall labor movement of the strike succeeding, and on 9 July 1897 placed Mahon in charge of coordinating a plan to help the West Virginia miners.

Union organizers spoke in mining towns throughout the coalfields, and the orderly behavior of the miners even when provoked drew public support.

The New York conciliation committee of the NCF approached Mahon and Warren Stanford Stone of the Brotherhood of Locomotive Engineers, "trying to impress the labor end of the dispute with the importance of being fair and decent."

"On the Part of the Public" included people such as former President Grover Cleveland, the industrialist and philanthropist Andrew Carnegie and Episcopal Bishop Henry C. Potter of New York City.

[14] In May 1913 Mahon was appointed to a three-man Detroit Street Railway Commission by Mayor Oscar Marx to study the possibility of municipal ownership of the streetcar lines.

[15] The Street Railway Commission made an offer to purchase the DUR in late summer of 1913, which was rejected.

However, they agreed that the question of municipal ownership would be submitted to the voters, and if they approved the Wayne County Circuit Court would set the price.

[17] Although employees complained that the streetcar operators were not raising wages to compensate for inflation, he said, "But no matter how justifiable this unrest may be, it must not influence us to acts that will compromise our integrity as an organization of workers that stands by its agreements and holds its obligations sacred."

Mahon supported Daniel J. Tobin, president of the Teamsters, who won the backing of the AFL Executive Council.

In an 1899 speech he called for the church to play a greater role in supporting organized labor, saying its "true mission" was to "establish the brotherhood of man.

[2] In 1937 Alexander F. Whitney informed mayor Fiorello La Guardia of New York City that the Brotherhood of Railroad Trainmen planned to start organizing Independent Subway System (ISS) motormen and conductors.

Mahon met the local union leaders and voiced his strong disapproval, saying they had violated their contracts and damaged the possibility of good relations with their employers.

The thing, however, has been done..." He then called for New York Mayor John Francis Hylan to be appointed the sole arbiter of the strike.