The Rivers were by no means the most difficult barriers to negotiate, but they were significant and could be dangerous.
Here is the natural wier on the Arriege just before it joins the Garonne. The Wire also served the function of a ford.
Many other barriers lay in the path of both John and Ximene as learned about life and the world in which they lived.
Their most important mentors were William Montacute, Joan of Kent and Lady Eleanor for John. Guilliame de Clermont-Dessu performed a similar role for Ximene. Despite her best intentions Lady Eleanor was more of a barrier than a mentor for Ximene.