P.37 is more general, and is an example of Phil space-saving. It says what happens when train are defending fortifications, and is non-specific as to the type of fortifications. It therefore does the job and makes sense when read with p.11, but is open to misinterpretation if read alone.
P.11 is more specific and makes it clear that train (Bge(O)) can defend TF but not PF.
More awkwardly, p.9 says (under the definition of Bge(O)) "It is the only Baggage that can defend TF it is inside" and yet p.11 says "These can be Temporary Fortifications [TF] defensible by any foot or train" (my emphasis). FWIW, I think that p.11 can be made to make sense with p.9 by reading p.11 as "defensible by (any foot) or (train)", i.e. to apply the any to the word "foot", but not to the word "train".
Tim Child
