Open for Comment!
Where the Topo section provides a factual account of events, recording how things were done, in locations and the people involved, this section, the "Observations" pages aim to reflect a few thoughts on those and as much contemporary events.
Data: from paper ... to the data deluge!
When I joined Ordnance Survey in 1969 there was not even a whiff of data around apart from the finance department and as regards maps perhaps in a few select university labs. Organisations were only just getting to grips with computers to pay salaries and then manage wider accounting needs. When I left in 2011 - data was the lifeblood of the organisation.