MYSTERY OF MISSING WINDSCREEN COVER

Last week I purchased a nice black cover to put over my windscreen during the frosty evenings which had worked well over the last few nights. My husband kindly pegged it over the washing line this morning but when he went out not long afterwards it had disappeared. It hasn't been a windy day and there is no sign of the cover anywhere. If you see it anywhere do leave a comment. It seems a strange thing for someone to pinch!