The Big Three and the White Ape Series
When it comes to Wang Lang, anybody’s speculations as just as every one else.
I have heard that the Tanglang Tou Tao is a favorite set of Luo Guangyu. It would seem to me that he put some of the combo found in that form into the 14 roads Tan Tui.
There seems to be an intimate relationship between the Seven Star line and Tongbei especially the Baiyuan Tongbei which IMHO is where the White Ape series came from.
I am not sure if Baiyuan Tou Tao is related to Tanglang Tou Tao. I have however seen a Tanglang Tou Tao played by the Russian contigent of TJPM. The flavor is different (with the TJPM flavor) while the structure is recognizable as TLTT. BTW, I don’t know for sure if it is called TLTT by the Russian TJPM group.
According to Ilya Profatilov’s translation of Liang Xuexiang’s manuscript “On Making it Possible to have Combat Courage” (Ke Shi You Yong - CE 1852) which is the very source of Meihwa/Taiji tradition begins, it has the following entry:
“In the pass Master Wang Lang created such forms as “Eight Elbows” (Fenshen Bazhou), “Chaotically Connected” (Luanjie), and “Secret Hands” (Mishou). Furthermore he discoursed on the theories of emptiness and fullness (Kung Shi) and softness and hardness (Gang Rou). His perfection was without bound.”
However, in his early manuscript "Boxing, Staff and Spear Fencing Mannual (Quan Gun Qiang Pu - CE 1842). There doesn’t seem to have mentioning of Wang Lang. Curious enough, there is Bengbu, Luanjie (AKA Meihwa) and Fenshen Bazhou.
I have came across bits and pieces of info on these manuscripts which lead me to think that Liang had already came across a version of the Luohan Xinggong Duanda (Arhat Short Strikes - mid 1700 CE) manuscript as early as 1842 which he basically paraphrased some of the content to form his own manuscripts. He would have reorganized his teaching materials around 1852 based on the insight he gained from reading and/or working the LHXGDD. This is why the mentioning of Wang Lang who is also mentioned in the LHXGDD. Gang Rou and Xu (Kung) Shi are also important concepts found in the LHXGDD. I believe that Liang by 1852 was ready to present a full system of his own which is base on Tanglang profile of Plumblossom Grand ultimate hands, winter rooster step and Monkey disposition.
In later manuscripts by his grandstudents such as Cui Shoushan’s Tanglang Quanpu (CE 1935), Luanjie, Bengbu, Meihwalu, Fenshen Bazhou and Zhaiyao (7 sections) are mentioned as the mantis corpus amongst other forms (no White Ape series at all). Only the Luanjie, Fenshen Bazhou and Zhaiyao have detailed apps descriptions and special commentaries that are based on Yijing (classic of change) principles and concepts. This lead me to believe that these 3 forms are really the backbone or pillars of Liang’s system. Bengbu and Meihwalu seemed to be less of a core forming material IMHO.
Just some thoughts to share. 
Mantis108