I can't really see what motive they'd have to get one of their guys across that would screw with my rebuilding efforts, but I'll catalog the event internally as a reason to think better or worse of them, depending on what occurs, it's a non-immediate anomaly worth future pondering. In the meantime I'll give him detailed instruction on what he's to do once across and have him demonstrate the proper knot to me a couple times, or show him then have him repeat it until I'm satisfied, or have someone else do it His big task is to get over there and secure the rope to something heavy, probably our originally grapple, then dump dirt and debris in front of it to anchor it more securely, I'll give him the option of a shovel obviously but he might be better off barehanded. Once he starts crossing we'll prep other people to go, they next person will be going with a pulley attached to them and one of the ropes, and a short one with a loose noose over the other to snatch them if the other rope drops, that pulley's gonna have two 80+ meters of rope on it so we can just have people on either end tug whatever attached across, man or cargo, but first we need the kobold across and the grapple anchored down. If that goes off without a hitch I'll be aiming to get about dozen people and a couple tons of cargo across so we can get the basic supports up and start laying planks from both ends at once. Assuming nothing goes wrong.