This morning, for the first time on my pilgrimage, I have had serious internal turmoil. (I'm trying to be circumspect.) Beginning a 40 km walk with gastrointestinal issues is not something I'm keen to do, so I think I'll stay in Edessa for an extra day and then hop a bus to Thessaloniki on Sunday after Liturgy. (My 90 day stay in the Schengen area is rapidly drawing to a close.) I think it'll be safe to make short exploratory forays into the old city, but I won't be going too far from civilisation today. I may also visit a pharmacy and buy a remedy for what's ailing me.