was gripping the city of Philadelphia. Men referred
to this revival afterwards as "the work of God in Philadelphia."

One of the most earnest and zealous leaders in the movement was a young
pastor, Dudley A. Tyng, not quite thirty years old. Because of his
evangelical convictions and his strong opposition to slavery he had
shortly before been compelled to resign as rector of the Church of the
Epiphany, and in 1857 he had organized a little congregation that met in
a public hall.

In the midst of the revival in 1858 he preached a powerful sermon at a
noon-day meeting in Jayne's Hall to a gathering of 5,000 men. His text
was Exodus 10:11: "Go now, ye that are men, and serve the Lord." It is
said that the effect was overwhelming, no less than a thousand men giving
themselves to the Lord.

A few weeks later the young pastor was watching a corn-shelling machine
when his arm was caught in the machinery and terribly mangled. Though
every effort was made to save his life, he died within a few hours.
Shortly before the end came he cried to the friends who were gathered
about him, "Sing, sing, can you not sing?" He himself then began the
words of "Rock of Ages," with the others trying to join him in the midst
of their grief. When his father, the distinguished clergyman, Stephen H.
Tyng, bent over him to ask if he had a last message for his friends, the
dying soldier of the cross whispered:

"Tell them to stand up for Jesus!"

Rev. George Duffield, also of Philadelphia and a close friend of the
greatly lamented Tyng, felt that the words were too impressive to be
lost. On the following Sunday he preached a sermon in his own church on
Ephesians 6:14, "Stand, therefore, having your loins girt about with
truth, and having on the breastplate of righteousness." As he concluded
his sermon, he read the words of a poem he had written, "Stand up, stand
up for Jesus."

Not only did Duffield preserve the dying words of his devoted friend, but
it will be noted that the second stanza also contains the challenge of
Tyng's last revival sermon: "Go now, ye that are men, and serve the
Lord."

The superintendent of Duffield's Sunday school printed the words of the
poem for distribution among his scholars. One of these leaflets found its
way to a religious periodical, where it was published. Soon it began to
appear in hymn-books, being generally set to a tune composed by George J.
Webb a few years earlier. It is said that the first time the a