Wang Peisheng studied for several years with Ma Gui. His representative in the U.S. is Zhang Yun. I’d suggest e-mailing Zhang for more detail if you’re interested. The website is http://www.geocities.com/ycgf/
Marc Jones has published a number of pictorial articles for Zhang Yun that lay out some of Ma Gui’s palm changes and their applications in his “Internal Martial Arts Journal”. Some of Ma Gui’s history is included there. His website is www.sixharmonies.org.
Other sources for bits of Ma Gui’s baguazhang are the history chapter in Liang Shou-yu and Yang Jwing-ming’s book on Emei baguazhang and B.K. Frantzis’ book on his own martial arts meanderings (Frantzis says that his bagua guru in Beijing, Liu Hung Chieh, was a student of Ma Gui).
The following excerpt is Joe Crandall’s translation of some paragraphs on Ma Gui.
"by Chen Rongliang
Ma Kuei
Ma Gui (1857-1941) was from Shandong. He was also called Shiqing. Early in his life he moved to the capitol. At the age of 18 (1875) he asked Yin Fu to be his teacher in Baguzhang. He recieved all of Yin Fu’s teachings and at the same time was coached by Dong Haiquan.Thus his skills in Bagua were very deep. His outstanding use of the straight arm wrist strike was well known in the martial community. Using the wrist to strike men is a high skill of Yin Style Bagua. The wrist strikes are: Cutting Wrist, Intercepting Wrist, Stroking Wrist, Top Wrist, Plucking Wrist, Pulling Wrist, Hooking Wrist, Seizing Wrist, and Pushing Wrist. In using the Cutting Wrist, for instance, should the enemy attack with a straight strike, I use my front hand, little finger side, to cut down on the incoming wrist, then use the rear hand to attack. With the Intercepting Wrist, should the enemy use his hand to attack my head, my front hand turns inward, using the little finger side to make a strong point intercepting cut on the wrist and foil the enemy. Ma Kuei practiced his wrist striking kungfu for many years and ultimately became quite famous. Near the end of the Qing Dynasty he used his cutting wrist in the Langong Palace to break the arm of a martial arts teacher. He was made head of the palace’s many martial arts instructors. He became famous in the capitol and people called him “Little Kunlun Ma Gui”.
When he was 23 (1880) he started a business as a lumber merchant. When not occupied he practiced martial arts. He set up a studio where students could exchange skills. At that time Cheng Tinghua’s and Liu Fengchun’s men were in the capitol and would come to the Lumber shop to practice. Ma Gui also got these seniors to coach him many times. Thus his martial skills quickly advanced and became pure.
Ma Kuei did not have many students. Only one man, Cao Zhong Sheng (Yin Fu’s student), recieved some tutoring . Mr Cao, with his student Lu, wrote a book in 1932 with a short chapter on Ma’s life".
Joe Crandall’s new website URL is http://users2.ev1.net/~stma/. You might ask him if the translation of the book on Yin Fu(Cao)style baguazhang by Zhang Jie includes information on Ma Gui. I can’t find my copy.