If you enter Bayonne in the search box above you will get to several posts that mentions this stretch. Here is what I found:
We will stay the night in Bayonne and look around there a bit. Then we will take the first or the second train to SJPdP, which will bring us there not before 10.05h. Then we will need to get our pilgrim passports stamped and get some vittles before we can make for the hills.