"The remainder of this month, I was continually engaged in translating an alphabet to the Book of Abraham, and arranging a grammar of the Egyptian language as practiced by the ancients." On this same date, W. W. Phelps writes to his wife, "These records of old times, when we translate them and print them in a book, will make a good witness for the Book of Mormon." (In reference to the above Phelps letter, Hugh Nibley argues that because Phelps said "we translate them," all of Joseph Smith's notes, Egyptian grammars, etc., were not necessarily prepared by Joseph alone, if at all. Phelps apparently tried his hand at some of these things too, and scholars should be careful not to attack Joseph for the alphabet and grammar if they were, in fact, only vain attempts by W. W. Phelps.
[History of the Church of Jesus Christ of Latter-day Saints (7 volumes) 2:238; Brigham Young University Studies (various issues), Su '71, 394 - referenced in Conkling, Christopher J., Joseph Smith Chronology]