set of 48 manuscript diaries covering the work of LEO engineer Ernest Lenaerts from LEO I to LEO III. http://www.billp.org/LEO/ The note books are held at the Cambridge Centre for Computer History and being professionally archived and made available for exhibition. See also electronic Engineering, Vol. 23, pp. 140-141.
https://www.computinghistory.org.uk/sec/55629/Lenaerts-Notebooks/
