Lamping as usual last night, very, very pleasant in the last bit of sun, & then things started to change quickly, first sign, the bino's focus wheel stiffened up as the grease took on the temperature change, Mike's temp gauge on the motor slid rapidly from -3 to -13, thats when the rifles started to grow hoarfrost in all the crevices, only three rabbits ventured out in 4 hours! Mike slotted the heaviest Dog fox I have ever picked up, & he was stiff as I got back to the motor, a quick visit to the pub for a gargle as we entered, we noticed they had a simplex oil heater in every one of the nooks where they set tables, on the drive home we saw thermoclines with fog bands in different layers just ending at about the top of a double deck bus, as we passed over a road crossing on a small stream the temp read -17 for about a mile.