""A Letter By Mar Jacob, Bishop Of Edessa, On Syriac Orthography: Also A Tract By The Same Author, And A Discourse By Gregory Bar Hebraeus On Syriac Accents"" is a book published in 1869 that contains three works related to the Syriac language. The first work is a letter written by Mar Jacob, the Bishop of Edessa, on the topic of Syriac orthography, which refers to the correct spelling and writing of words in the Syriac language. The second work is...