[2] He there befriended his classmate, Walter Rauschenbusch, a future Baptist theologian and proponent of the Social Gospel.

[2] At the commencement ceremony, he delivered a well-received oration on Irish political leader Daniel O'Connell.

[4] Pope Leo XIII conferred a Doctor of Sacred Theology degree on him without the need for an oral examination in 1886.

[4] Hanna had a close friendship with San Francisco Mayor James Rolph Jr.

[6] As governor, Rolph appointed Hanna as the chairman of a state mediation board to resolve the 1933 cotton strike in Corcoran, California.

[7] During the 1934 West Coast waterfront strike, President Franklin Roosevelt named Hanna the chairman of the National Longshoremen's Board.

Hanna was key to the founding of St. Joseph's Seminary in Mountain View, California, and it was considered "the jewel of his accomplishments".

[9] Archbishop Hanna retired March 2, 1935, due to ill health and advancing age.