I want to know the answer to the following question:
With whom did Athanasius travel to Sardica?
All the background I'm provided with is that "Early in the year 343 we find Athanasius had travelled, via Rome, from Alexandria, North Africa, to Gaul; nowadays Belgium / Holland and surrounding areas, where Hosius of Cordoba was Bishop, the great champion of orthodoxy in the West.". Is that enough to answer the question?