sentences:  The negotiations foundered, however, upon the refusal of Sweden to refer the points in dispute to a general peace-congress, and Charles received encouragement from the capture of Fredriksodde, 23-24 October, whereupon he began to make preparations for conveying his troops over to Funen in transport vessels.But soon another and cheaper expedient presented itself.In the middle of December 1657 began the great frost, which would prove so fatal to Denmark-Norway.