Very mild for season - 51 degrees. Very dull; humid. Poor old Chas came in mid-day. He had just some off duty after a heavy night of fire fighting as a result of intense incendiary bombing of the City of London by the Nazis: he was exhausted and had a seat by the fire: gave him some ginger wine. Many fine old City buildings were destroyed. To South Wimbledon to buy plywood for a baffle to fit the new louspeaker to, which I did last night: tried it on the gramophone but not quite satisfied.