I left Emstrur early. I had just a few hours to go to finish the job I'd started ten years before, and I was in a good mood. The trail started with a steep descent, so steep that it required a little bit of abseiling, using a handily-placed rope. A bridge crossed the Ytri-Emstruá river, and then the trail reached the point where that and the Markarfljót joined. One was dark grey and the other was light grey, and the different shades flowed side by side.
I followed the course of the Markarfljót. The trail was flat, it was warm and sunny, and I made fast progress. Then the trail turned steeply upwards for a while, and the views got more and more amazing the higher I got. I reached a ridge, and far below I could see what looked like a modest river. The path dropped down towards it, and the closer I got, the more I could see how much I'd underestimated it. By the time I got to its banks I could see it was not going to be easy.
I was glad to meet a couple of Dutch hikers who had just crossed. If I fell and was swept away to a grim death, at least someone would know. They had found a decent place to cross, and they shouted back across the raging torrent to direct me. They also threw me a pair of flip-flops - until now I'd just crossed all the rivers barefoot. I tied everything to my pack and ploughed into the waters.
The rivers until now had been ankle-deep at worst but this one was over my knees straight away. In the middle it was up to my hips and the current was pushing me downstream. A slip would have been disastrous but luckily I made it across. I thanked the Dutch couple and gave them back their flip-flops. Then I realised I'd left one of my socks on the other side of the river.