Baguazhang was originally taught orally. Ma Gui had some learning, so could most likely write, but did not leave any written materials. Li Baohua said that Yin Yuzhang, Yin Fu's son, wrote the verses that are the most directly connected to the oral teachings of Dong Haichuan, but most say Zeng Zengqi wrote them (if this is talking about the 36 verses and the 48 methods verses). Liu Wanchuan had the verses in his head and could recite them, but the ones he wrote down had many errors, as he was not very literate.
If you would like a translation of the verses, you can get my book A Shadow on Fallen Blossoms, which translates, comments, and explains the social and historical background, published in June, 2017. This is available in soft cover book, pdf, and epub editions.
