I don't remember exactly, but I think you either need to get boots of levitation or walk on water. I'm not sure if there's a boat there.
I played the map a long time ago, but I don't remember having this problem.
I have walk on water and boots. What's the point? I teleported to that damn cross. And where to now? If you put the boots on the fastest unit, no path to any of the pillars on the other side is shown.
Added after 12 hours 34 minutes
I don't remember exactly, but I think you either need to get boots of levitation or walk on water. I'm not sure if there's a boat there.
I played the map a long time ago, but I don't remember having this problem.
Okay, I messed up. I didn't open the lookout hut, so Cuthbert couldn't see the shore.
Damn, I have to replay again....