McCalla, George W. The Seven Seals Opened: An Interpretation of Rev. V-VIII in which The Opening of the Seven Seals are shown to set forth The Believer's Progress and Development in the Christ-Life. Philadelphia: George W. McCalla, 1899. First Edition.
Blue cloth with white titles, 5 1/4 x 7 1/2 inches, binding a bit soiled, 55 clean pp. plus publisher's catalogue, last leaf of catalogue partially detached. Good. Hardcover. 
Scarce, with WorldCat recording one holding, at the Library of Congress.
"In his earlier religious activity McCalla used to practice 'the laying on of hands,' and he tells me that he was accustomed to feel a kind of electric power beginning in his shoulder and passing down his arm. He would also hear a whirring sound, as of moving machinery, when this power was transmitted to his patients. Owing to his dislike of charlatanry he kept this feature of his work in the background and gradually gave it up altogether." - Albert J. Edmunds, in The Conservator, August 1903.
We find in McIntyre's biography of E. W. Kenyon that McCalla and R. Kelso Carter organized the first convention exclusively on the subject of divine healing in 1882. The year previous McCalla published Ethan O. Allen's Faith Healing; or, What I Have Witnessed of the Fulfilling of James V:14, 15, 16.
George Washington McCalla was a Philadelphia author and publisher, and the editor of the periodical Words of Faith for the Unfolding of Spiritual Life and Light. Besides his own books, he issued editions by such authors as Madame Guyon, Fenelon, Walter Hilton, Mrs. P. L. Upham, Beaufort, Isaac Penington, John of the Cross, and John Falconi.