Frost still severe. The air is dry and clear and the ground hard and clean: the roads are getting dusty. Some sun in afternoon which caused a slight thaw where it fell. To do shopping locally including posting a letter containing a funny poem (?) by myself to Uncle Tom. To Wimbledon also, returning along line. Saw Atlantic loco.Trevose Head. The new speech coil made yesterday is successful but a very close fit over the centre pole.