My friend "Argonne" did a search and to find information:
Nito Walker fell to the field of honor in September 1915 (list of losses of the 6.10.15, page 9202, publication No. 720).
It was then mentioned in the 6/RJR262, a change of company in the same unit is not rare in time of war, I have noticed several times for other research.
http://des.genealogy.net/search/show/2966983" onclick="window.open(this.href);return false;