There were two separate trading posts sometimes called the Rix Robinson Trading Post: Post 1. Earlier trading post in Lowell, Mi. Located near an historical marker on the South side of Fulton St. at Bowes Rd. Established by the independent French trader Joseph LaFramboise in the 1790's. LaFramboise and Madgelene Marcot La Framboise were married in 1796. He was killed in 1806, but she continued to run the post until 1821, when Robinson took it over. This post is sometime also referred to as the Rix Robinson Trading Post. Post 2. Ada, Mi. Rix Robinson Trading Post, located across from the Ada Cemetery between Grand River Drive and the Grand River itself. Robinson took over the trading post run by retiring Madame LaFramboise in Lowell, and is said to have moved it to the present day town of Ada, Michigan at the junction of the Thornapple River & the Grand River. Robinson ran this post until 1834. He may have operated both posts in Lowell and Ada at the same time. Another point of confusion, of the various Robinson sites, is Robinson's House in Ada, which is documented at a separate site on Fulton St./M-21 in Ada. Fur trading business probably also went on in his home, and images which may exist of the two Ada buildings may also sometimes confuse these two structures. Robinson House may be where the later historical marker was placed, and then subsequently moved by Amway Corporation, since the marker is described in Series VII below as being on M-21, not on Grand River Road.

Robinson also established several other trading posts in the West Michigan area while working for the American Fur Trading Co.

A newspaper article here also documents what is evidently another dig at Lowell, for the separate and later Daniel De Marsac trading post, built 1831 on the Grand River at Lowell, and also researched by Dr. Flanders, in 1976.