Thanks for this. I didn’t spot the layout but that seems to work better on the map. Added the separate FED in the circle to my thought process and the ??? Bordeaux. (I’m probs wrong) but starting to come together. Looking vaguely like an eagle but I think my mind is reaching.
Tried adding a pic but won’t let me. Try joining FED cities in a triangle. Add in 7-1, 7-2, 1-0 and 7-5 lines. Then draw line straight from cherbourg to Bordeaux (It will pass through angers.)