Railway maps

[Oldleg]

I am not sur if I have asked this before but we know that there were railway tracks that went through the forest of Lyons which surrounds Lyons La Forêt, France,  but we don't know where they were. I have been trying to find any maps showing where these railways were but have been unsuccessful. Can anyone help? I know that the Royal Engineers were here but don't were their camp or camps were, so, if anyone can help there as well that would be great. 

 

I appologize in advance if I have posted this uestion before. 

 

Alex.