Parallel routes.
It will be remembered that the path of the Atlantic coast was little used, at least in the first years of the pilgrimage, due to the dangers coming from the sea, particularly the Normans who terrorized the populations. It was therefore necessary to cross the Pyrenees, and thus, alongside the large routes described in the "Guide", there were a number of small parallel routes, particularly in the western Pyrenees. Olor n and the Somport pass, on the one hand, and the Cize or Roncesvalles passes, on the other, the Saison valley led, via Maulon and Tardets, then Larrau or Sainte-Engré ce, towards the Aragonese valleys, that of Salazar and that of Roncal, through the Larrau pass or the Erraitze pass (Lambert, 1959). The second route, the one that went from Moissac to Ostabat, passed through Condom, Eauze, Aire, the abbey of Sauvelade, Navarrenx and Maulon.