Henry Caswall's abridged account of the Greek Psalter episode from 1843.
Henry Caswall, The Prophet of the Nineteenth Century; or, the Rise, Progress, and Present State of the Mormons, or Latter-day Saints (London: J. G. F. & J. Rivington, 1843), 223–224
When an ancient Greek manuscript of the Psalms was exhibited to him as a test of his scholarship, he boldly pronounced it to be a "Dictionary of Egyptian hieroglyphics." Pointing to the capital letters at the commencement of each verse, he said, "Them figures is Egyptian hieroglyphics, and them which follows is the interpretation of the hieroglyphics, written in the reformed Egyptian language. Them characters is like the letters that was engraved on the golden plates." He afterwards proceeded to show his papyrus, and to explain the inscriptions; but probably suspecting that the author designed to entrap him, he suddenly left the apartment, leaped into his light waggon, and drove away as fast as possible. The author could not properly avoid expressing his opinion of the prophet to the assembled Mormons; and was engaged for several hours in a sharp controversy with various eminent dignitaries.