A faithful restoration of "A Devout Method of Hearing Mass, in Union with the Passion of Jesus Christ" from "The Key of Heaven, or A Manual of Prayer". Originally published in 1870 by P.J. Kennedy Publishers, New York with the approbation of the Most Reverend John McCloskey, D.D., Archbishop of New York. Images & text are from the original publication. Page numbers are adjusted to match this excerpt. This version is published in 2024 by Catholic Memoirs.