Poem reads:
That Rock was Christ
Anonymous

Eternal Rock, to Thee I fly,
In Thy rent fissures would I hide;
No rill of mercy flows to me,
But issues from Thy wounded side.

Earth’s fondest hopes and brightest dreams
Are fitful, fugitive and vain;
The best of its polluted streams
I only drink to thirst again.

Forgiveness, peace, salvation, heaven,
Jesus, I owe alone to Thee;
The Rock whose clefts for me were riven,
The smitten One of Calvary.