Bernard left two "Filofax"-style folders containing handwritten notes and appointment diaries for various times between 1942 and 1948, covering his time working on radar during and after World War 2. Before 1939 he was at Bawdsey, and on the outbreak of war moved to ADRDE at Christchurch and later to Malvern.
Bernard had burnt a huge pile of "Top Secret" documents in the 1970s, and this is all that he left from that period of his life. One must presume that he felt it to be valuable or interesting to others.
One big problem with these notes is that the dates are hard to work out. There are not many actual dates, and it is obvious that the pages are not in strict date order. At the moment they are presented here in exactly the same order as in the physical notebooks.