the newspaper is the best initial option, then do not be attempted to dry them on a radiator or anything, if you still have the box, there should be some silicone sachets in there, store them in the box with the sachets, and as many more as you can find in other boxes, and then with the lid closed the silicone will absorb any really soaked in moisture. after a few days, remove the shoes and give them a clean with a good leather cleaning spray and then a leather protector spray, so that next time you wear them in the rain, they are slightly more water resistant!